Stoinov, S.G., Penchev, P.I., Gerova, V.A. and Tsenova, V.G. 2008. Histamine, 5-hydroxytriptamine, collagen, mast cells and Ig-secreting cells in the small bowel disorders with diarrhea. Journal of Gastrointestinal and Liver Diseases. 17, 4 (Dec. 2008), 479–487.