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Publisher
- public library of science14
- elsevier bv10
- springer science and business media llc8
- institute of basic medical sciences and peking union medical college hospital, chinese academy of medical sciences / peking union medical college.6
- wiley6
- bmc5
- informa uk limited5
- baishideng publishing group inc.4
- bmj publishing group ltd and british society of gastroenterology4