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Validity of peptic ulcer disease and upper gastrointestinal bleeding diagnoses in administrative databases: a systematic review protocol
Montedori, Alessandro, Abraha, Iosief, Chiatti, Carlos, Cozzolino, Francesco, Orso, Massimiliano, Luchetta, Maria Laura, Rimland, Joseph M, Ambrosio, GiuseppeVolume:
6
Language:
english
Journal:
BMJ Open
DOI:
10.1136/bmjopen-2016-011776
Date:
September, 2016
File:
PDF, 670 KB
english, 2016