Postprandial platelet-poor plasma 5-hydroxytryptamine concentrations during diarrhea and constipation periods of alternatingtype irritable bowel syndrome patients - ŞEN, Fatma; PINARBAŞI, Binnur; İŞSEVER, Halim and AKYÜZ, Filiz and MUNGAN, Zeynel and KAYMAKOĞLU, Sabahattin (Turkish Journal of Gastroenterology, 2011)