Table 1. Top 10 cited COVID-19 preprints.

Rank	Source	DOI	Title	Posted date	Citations
1	medRxiv	10.1101/2020.02.06.20020974	Clinical characteristics of 2019 novel coronavirus infection in China	February 9, 2020	652
2	bioRxiv	10.1101/2020.02.07.937862	Severe acute respiratory syndrome-related coronavirus—The species and its viruses, a statement of the Coronavirus Study Group	February 11, 2020	513
3	medRxiv	10.1101/2020.01.23.20018549	Novel coronavirus 2019-nCoV: early estimation of epidemiological parameters and epidemic predictions	January 24, 2020	361
4	bioRxiv	10.1101/2020.01.26.919985	Single-cell RNA expression profiling of ACE2, the putative receptor of Wuhan 2019-nCov	January 26, 2020	359
5	medRxiv	10.1101/2020.03.22.20040758	Efficacy of hydroxychloroquine in patients with COVID-19: results of a randomized clinical trial	March 30, 2020	358
6	bioRxiv	10.1101/2020.01.31.929042	The novel coronavirus 2019 (2019-nCoV) uses the SARS-coronavirus receptor ACE2 and the cellular protease TMPRSS2 for entry into target cells	January 31, 2020	313
7	bioRxiv	10.1101/2020.02.03.931766	Specific ACE2 Expression in Cholangiocytes May Cause Liver Damage After 2019-nCoV Infection	February 4, 2020	304
8	bioRxiv	10.1101/2020.01.22.914952	Discovery of a novel coronavirus associated with the recent pneumonia outbreak in humans and its potential bat origin	January 23, 2020	302
9	bioRxiv	10.1101/2020.01.30.927806	The digestive system is a potential route of 2019-nCov infection: a bioinformatics analysis based on single-cell transcriptomes	January 31, 2020	285
10	medRxiv	10.1101/2020.02.11.20021493	Laboratory diagnosis and monitoring the viral shedding of 2019-nCoV infections	February 12, 2020	277

COVID-19, Coronavirus Disease 2019.