Study ID	Reference of included citation
93	Ahmed, S., R. K. Shahid, et al. (2013). "Should noncurative resection of the primary tumour be performed in patients with stage iv colorectal cancer? A systematic review and meta-analysis." Curr Oncol20(5): e420-441.
113	Al Rawahi, T., A. D. Lopes, et al. (2013). "Surgical cytoreduction for recurrent epithelial ovarian cancer." Cochrane Database Syst Rev2: CD008765.
151	Alhazmi, A., E. Stojanovski, et al. (2013). "The association between dietary patterns and type 2 diabetes: a systematic review and meta-analysis of cohort studies." J Hum Nutr Diet.
227	Andrade, J. G., M. W. Deyell, et al. (2013). "Risk of bleeding on triple antithrombotic therapy after percutaneous coronary intervention/stenting: a systematic review and meta-analysis." Can J Cardiol29(2): 204–212.
269	Antoniou, G. A., G. S. Georgiadis, et al. (2013). "A meta-analysis of outcomes of endovascular abdominal aortic aneurysm repair in patients with hostile and friendly neck anatomy." J Vasc Surg57(2): 527–538.
375	Bacchetti, S., S. Bertozzi, et al. (2013). "Surgical treatment and survival in patients with liver metastases from neuroendocrine tumors: a meta-analysis of observational studies." Int J Hepatol2013: 235040.
433	Bao, F., P. Ye, et al. (2013). "Segmentectomy or lobectomy for early stage lung cancer: a meta-analysis." Eur J Cardiothorac Surg.
459	Bartels, S. A., T. J. Gardenbroek, et al. (2013). "Systematic review and meta-analysis of laparoscopic versus open colectomy with end ileostomy for non-toxic colitis." Br J Surg100(6): 726–733.
481	Bavinger, C., E. Bendavid, et al. (2013). "Risk of cardiovascular disease from antiretroviral therapy for HIV: a systematic review." PLoS One8(3): e59551.
491	Beales, I. L., A. Hensley, et al. (2013). "Reduced esophageal cancer incidence in statin users, particularly with cyclo-oxygenase inhibition." World J Gastrointest Pharmacol Ther4(3): 69–79.
525	Belkhair, S. and G. Pickett (2013). "One versus double burr holes for treating chronic subdural hematoma meta-analysis." Can J Neurol Sci40(1): 56–60.
559	Berhan, Y. and A. Berhan (2013). "A meta-analysis of reverse breech extraction to deliver a deeply impacted head during cesarean delivery." Int J Gynaecol Obstet.
627	Billioud, V., A. C. Ford, et al. (2013). "Preoperative use of anti-TNF therapy and postoperative complications in inflammatory bowel diseases: a meta-analysis." J Crohns Colitis7(11): 853–867.
791	Brown, K. A., N. Khanafer, et al. (2013). "Meta-analysis of antibiotics and the risk of community-associated Clostridium difficile infection." Antimicrob Agents Chemother57(5): 2326–2332.
916	Carnuccio, P., J. Jimeno, et al. (2013). "Laparoscopic right colectomy: a systematic review and meta-analysis of observational studies comparing two types of anastomosis." Tech Coloproctol.
990	Chang, K. H., J. P. Burke, et al. (2013). "Infliximab versus cyclosporine as rescue therapy in acute severe steroid-refractory ulcerative colitis: a systematic review and meta-analysis." Int J Colorectal Dis28(3): 287–293.
1025	Chatu, S., V. Subramanian, et al. (2013). "The Role of Thiopurines in Reducing the Need for Surgical Resection in Crohn's Disease: A Systematic Review and Meta-Analysis." Am J Gastroenterol.
1063	Chen, W. K. and C. H. Miao (2013). "The effect of anesthetic technique on survival in human cancers: a meta-analysis of retrospective and prospective studies." PLoS One8(2): e56540.
1065	Chen, Y., J. J. Guan, et al. (2013). "Outcome of Cervicocranial Artery Dissection with Different Treatments: A Systematic Review and Meta-analysis." J Stroke Cerebrovasc Dis.
1161	Chu, H., L. Zhao, et al. (2013). "Sulbactam-based therapy for Acinetobacter baumannii infection: a systematic review and meta-analysis." Braz J Infect Dis17(4): 389–394.
1367	de Cuba, E. M., R. Kwakman, et al. (2013). "Cytoreductive surgery and HIPEC for peritoneal metastases combined with curative treatment of colorectal liver metastases: Systematic review of all literature and meta-analysis of observational studies." Cancer Treat Rev39(4): 321–327.
1399	De Vecchis, R., C. Esposito, et al. (2013). "Cabergoline use and risk of fibrosis and insufficiency of cardiac valves : Meta-analysis of observational studies." Herz38(8): 868–880.
1621	Duranton, F., M. E. Rodriguez-Ortiz, et al. (2013). "Vitamin D treatment and mortality in chronic kidney disease: a systematic review and meta-analysis." Am J Nephrol37(3): 239–248.
1675	El-Hussuna, A., A. Krag, et al. (2013). "The effect of anti-tumor necrosis factor alpha agents on postoperative anastomotic complications in Crohn's disease: a systematic review." Dis Colon Rectum56(12): 1423–1433.
1741	Eurich, D. T., D. L. Weir, et al. (2013). "Comparative safety and effectiveness of metformin in patients with diabetes mellitus and heart failure: systematic review of observational studies involving 34,000 patients." Circ Heart Fail6(3): 395–402.
1932	Forst, T., M. Hanefeld, et al. (2013). "Association of sulphonylurea treatment with all-cause and cardiovascular mortality: a systematic review and meta-analysis of observational studies." Diab Vasc Dis Res10(4): 302–314.
1980	Fu, D., G. Li, et al. (2013). "Comparison of clinical outcome between simultaneous-bilateral and staged-bilateral total knee arthroplasty: a systematic review of retrospective studies." J Arthroplasty28(7): 1141–1147.
2044	Gandhi, S., N. Narula, et al. (2013). "Meta-analysis: colonoscopic post-polypectomy bleeding in patients on continued clopidogrel therapy." Aliment Pharmacol Ther37(10): 947–952.
2112	Gedmintas, L., D. H. Solomon, et al. (2013). "Bisphosphonates and risk of subtrochanteric, femoral shaft, and atypical femur fracture: a systematic review and meta-analysis." J Bone Miner Res28(8): 1729–1737.
2196	Gong, J., L. Zhu, et al. (2013). "Use of thiopurines and risk of colorectal neoplasia in patients with inflammatory bowel diseases: a meta-analysis." PLoS One8(11): e81487.
2343	Habib, A. G. and D. A. Warrell (2013). "Antivenom therapy of carpet viper (Echis ocellatus) envenoming: effectiveness and strategies for delivery in West Africa." Toxicon69: 82–89.
2441	Haverkamp, L., T. J. Weijs, et al. (2013). "Laparoscopic total gastrectomy versus open total gastrectomy for cancer: a systematic review and meta-analysis." Surg Endosc27(5): 1509–1520.
2733	Hyun, M. H., C. H. Lee, et al. (2013). "Systematic review and meta-analysis of robotic surgery compared with conventional laparoscopic and open resections for gastric carcinoma." Br J Surg100(12): 1566–1578.
2795	Jackson, C., A. Mann, et al. (2013). "Effectiveness of Haemophilus influenzae type b vaccines administered according to various schedules: systematic review and meta-analysis of observational data." Pediatr Infect Dis J32(11): 1261–1269.
2825	Jamjoom, A. A. and A. B. Jamjoom (2013). "Safety and efficacy of early pharmacological thromboprophylaxis in traumatic brain injury: systematic review and meta-analysis." J Neurotrauma30(7): 503–511.
3030	Karthikeyan, G., N. B. Senguttuvan, et al. (2013). "Urgent surgery compared with fibrinolytic therapy for the treatment of left-sided prosthetic heart valve thrombosis: a systematic review and meta-analysis of observational studies." Eur Heart J34(21): 1557–1566.
3097	Khan, A. R., M. Riaz, et al. (2013). "The role of statins in prevention and treatment of community acquired pneumonia: a systematic review and meta-analysis." PLoS One8(1): e52929.
3496	Li, B. H., X. Ding, et al. (2013). "Meta-analysis of clinical outcomes of intravenous recombinant tissue plasminogen activator for acute ischemic stroke: within 3 h versus 3–4.5 h." Curr Med Res Opin29(9): 1105–1114.
3692	Liu, X., S. Min, et al. (2013). "Anterior corpectomy versus posterior laminoplasty for multilevel cervical myelopathy: a systematic review and meta-analysis." Eur Spine J.
4032	Mazza, M., F. D'Ascenzo, et al. (2013). "Drugs for attention deficit-hyperactivity disorder do not increase the mid-term risk of sudden death in children: a meta-analysis of observational studies." Int J Cardiol168(4): 4320–4321.
4335	Nakamura, M. and H. Nakashima (2013). "Laparoscopic distal pancreatectomy and pancreatoduodenectomy: is it worthwhile? A meta-analysis of laparoscopic pancreatectomy." J Hepatobiliary Pancreat Sci20(4): 421–428.
4375	Nderitu, P., L. Doos, et al. (2013). "Non-steroidal anti-inflammatory drugs and chronic kidney disease progression: a systematic review." Fam Pract30(3): 247–255.
4528	O'Neill, M., P. S. Moran, et al. (2013). "Robot-assisted hysterectomy compared to open and laparoscopic approaches: systematic review and meta-analysis." Arch Gynecol Obstet287(5): 907–918.
4679	Park, H. J., D. W. Kim, et al. (2013). "Staging laparoscopy for the management of early-stage ovarian cancer: a metaanalysis." Am J Obstet Gynecol209(1): 58 e51-58.
4731	Pazionis, T. J., H. Alradwan, et al. (2013). "A Systematic Review and Meta-Analysis of En-Bloc vs Intralesional Resection for Giant Cell Tumor of Bone of the Distal Radius." Open Orthop J7: 103–108.
5377	Sarikaya, H., B. R. da Costa, et al. (2013). "Antiplatelets versus anticoagulants for the treatment of cervical artery dissection: Bayesian meta-analysis." PLoS One8(9): e72697.
5496	Sepehripour, A. H., S. Saso, et al. (2013). "Does off-pump coronary revascularization reduce mortality in re-operative coronary artery surgery? A meta-analysis of observational studies." Perfusion28(4): 340–349.
5528	Shan, L., P. Hao, et al. (2013). "Benefits of early tracheotomy: a meta-analysis based on 6 observational studies." Respir Care58(11): 1856–1862.
5548	Sharma, V., S. V. Deo, et al. (2014). "Meta-analysis of staged versus combined carotid endarterectomy and coronary artery bypass grafting." Ann Thorac Surg97(1): 102–109.
5744	Soeters, H. M., S. Napravnik, et al. (2013). "The effect of tuberculosis treatment on virologic and CD4+ cell count response to combination antiretroviral therapy: a systematic review." AIDS.
5746	Soeters, H. M., C. Poole, et al. (2013). "The effect of tuberculosis treatment at combination antiretroviral therapy initiation on subsequent mortality: a systematic review and meta-analysis." PLoS One8(10): e78073.
5840	Steinberg, B. A., V. Hasselblad, et al. (2013). "Dabigatran for periprocedural anticoagulation following radiofrequency ablation for atrial fibrillation: a meta-analysis of observational studies." J Interv Card Electrophysiol37(3): 213–221.
5882	Su, A. P., N. W. Ke, et al. (2014). "Is laparoscopic approach for pancreatic insulinomas safe? Results of a systematic review and meta-analysis." J Surg Res186(1): 126–134.
5958	Taioli, E., D. S. Lee, et al. (2013). "Long-term survival in video-assisted thoracoscopic lobectomy vs open lobectomy in lung-cancer patients: a meta-analysis." Eur J Cardiothorac Surg44(4): 591–597.
6040	Tee, M. C., Y. Cao, et al. (2013). "Effect of bariatric surgery on oncologic outcomes: a systematic review and meta-analysis." Surg Endosc27(12): 4449–4456.
6092	Thosani, N., S. N. Thosani, et al. (2013). "Reduced risk of colorectal cancer with use of oral bisphosphonates: a systematic review and meta-analysis." J Clin Oncol31(5): 623–630.
6526	Wang, L., Z. Wu, et al. (2013). "Laparoendoscopic single-site adrenalectomy versus conventional laparoscopic surgery: a systematic review and meta-analysis of observational studies." J Endourol27(6): 743–750.
6621	Weiss, A. J., S. Zhao, et al. (2013). "A meta-analysis comparing bilateral internal mammary artery with left internal mammary artery for coronary artery bypass grafting." Ann Cardiothorac Surg2(4): 390–400.
6779	Wu, X. S., P. Dong, et al. (2013). "Combined portal vein resection for hilar cholangiocarcinoma: a meta-analysis of comparative studies." J Gastrointest Surg17(6): 1107–1115.
6843	Xu, S. B., Y. P. Zhu, et al. (2013). "Patients get more long-term benefit from central pancreatectomy than distal resection: a meta-analysis." Eur J Surg Oncol39(6): 567–574.
6866	Yakoob, M. Y., B. T. Bateman, et al. (2013). "The risk of congenital malformations associated with exposure to beta-blockers early in pregnancy: a meta-analysis." Hypertension62(2): 375–381.
6912	Ye, X., J. Fu, et al. (2013). "Dose-risk and duration-risk relationships between aspirin and colorectal cancer: a meta-analysis of published cohort studies." PLoS One8(2): e57578.
6944	Yoon, J. M., E. G. Cho, et al. (2013). "Antidepressant use and diabetes mellitus risk: a meta-analysis." Korean J Fam Med34(4): 228–240.
7018	Zhang, H., C. Gao, et al. (2013). "Metformin and reduced risk of hepatocellular carcinoma in diabetic patients: a meta-analysis." Scand J Gastroenterol48(1): 78–87.
7020	Zhang, H., D. Jiang, et al. (2013). "Use of nonsteroidal anti-inflammatory drugs and bladder cancer risk: a meta-analysis of epidemiologic studies." PLoS One8(7): e70008.
7096	Zheng, H., S. Xue, et al. (2013). "Meta-analysis of clinical studies comparing coronary artery bypass grafting with percutaneous coronary intervention in patients with end-stage renal disease." Eur J Cardiothorac Surg43(3): 459–467.
7104	Zheng, Z., W. Liang, et al. (2013). "Liver Transplantation Versus Liver Resection in the Treatment of Hepatocellular Carcinoma: A Meta-Analysis of Observational Studies." Transplantation.
7108	Zheng, Z., H. Shi, et al. (2013). "Vitamin D supplementation and mortality risk in chronic kidney disease: a meta-analysis of 20 observational studies." BMC Nephrol14: 199.
7130	Zhou, X., J. L. Du, et al. (2013). "Statin therapy is beneficial for the prevention of atrial fibrillation in patients with coronary artery disease: a meta-analysis." Eur J Pharmacol707(1–3): 104–111.