July 17 (UPI) -- Women's marathon record holder Ruth Chepngetich was provisionally suspended due to a positive doping test, the Athletics Integrity Unit announced Thursday. Chepngetich produced a test March 14 that revealed the presence and use of hydrochlorothiazide, a diuretic classified as a prohibited and specified substance by the World Anti-Doping Agency. The integrity unit did not provide a timetable for Chepngetich's ban, but testing positive for a "specified substance" carries a