Tanisa Patcharatrakul, MD, M. Sc graduated from Chulalongkorn University, Thailand and undergone fellowship training at Division of Gastroenterology, Department of Medicine from Chulalongkorn university, and post-doc fellow from Augusta University, Georgia, USA. She is currently an Assist. Professor at Center of Excellence in Neurogastroenterology and Motility, Chulalongkorn University and Division of Gastroenterology, King Chulalongkorn Memorial Hospital. She is also a scientific committee of the Asian Neurogastroenterology and Motility Association and Thai Neurogastroenterology and Motility Society. She has been actively involved in the clinical research of functional GI disorders in particular constipation and anorectal disorders.