Table 3.

Top 15 co-cited journals distributed by citations and sigma.

Rank	Journal	Citations	Journal	Sigma
1	New Engl J Med	2,116	Am J Clin Nutr	3.09
2	Lancet	1,849	J Thorac Cardiov Sur	2.5
3	Circulation	1,678	J Trace Elem Med Bio	2.43
4	Ann Thorac Surg	1,639	Brain Res Bull	1.77
5	Anesthesiology	1,520	Obesity Facts	1.56
6	JAMA-J Am Med Assoc	1,487	Ann Thorac Surg	1.56
7	J Thorac Cardiov Sur	1,442	Brain Res	1.52
8	PLoS ONE	1,368	World J Surg	1.48
9	Anesth Analg	1,250	Med Educ	1.45
10	Brit J Anaesth	1,221	Neurosurgery	1.44
11	Stroke	1,139	Chest	1.42
12	Eur J Cardio-Thorac	1,030	New Engl J Med	1.41
13	Crit Care Med	988	Am J Surg	1.34
14	J Am Coll Cardiol	978	J Trauma	1.34
15	J Cardiothor Vasc An	913	Cardiovasc Surg	1.32