BPG is committed to discovery and dissemination of knowledge
Open-Access Journal
Teresa Arrigo, Salvatore Leonardi, Caterina Cuppari, Sara Manti, Angela Lanzafame, Gabriella D’Angelo, Eloisa Gitto, Lucia Marseglia, Carmelo Salpietro 
World J Gastroenterol 21(2):384-395. Published online Jan 14, 2015. doi: 10.3748/wjg.v21.i2.384
Basic Study
Case Control Study
Retrospective Study
Clinical Trials Study
Observational Study
Prospective Study
Randomized Controlled Trial
Evidence-Based Medicine
Systematic Reviews
Case Report