To everything there is a season, and a time to every purpose...-Ecclesiastes iii, 1.
Krevsky
Benjamin
B
D016099:Endoscopy, Gastrointestinal / Q000379:methods / Q000592:standards; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D012621:Seasons; D014481:United States