[1] Ctr Med Nacl Siglo XXI, Dept Gastroenterol & Clin Intestino, IMSS, Mexico City, DF, Mexico
[2] Asociac Farmaceut Mexicana AC, Subdirecc Farmacovigilancia, Mexico City, DF, Mexico
[3] Ctr Med Nacl La Raza, Dept Gastroenterol & Clin Colon, IMSS, Mexico City, DF, Mexico
[4] Fdn Clin Med Sur, Clin Enfermedades Digest & Obesidad, Mexico City, DF, Mexico
[5] Grp GAICCUM, Pract Privada, Mexico City, DF, Mexico
[6] Ctr Med Nacl Siglo XXI, Serv Cirugia Colon & Recto, IMSS, Mexico City, DF, Mexico
[7] Hosp Angeles Pedregal, Serv Gastroenterol & Endoscopia, Mexico City, DF, Mexico
[8] Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Gastroenterol, Clin Enfermedad Inflamatoria Intestinal, Mexico City, DF, Mexico