Evaluation of the Efficacy and Safety of Lubiprostone in Adults With Mixed or Unsubtyped Irritable Bowel Syndrome

Meritus Center for Clinical Research, Hagerstown

Wake Research Associates, LLC, Raleigh

PMG Research of Charlotte, Concord

PMG Research of Charlotte, Charlotte

Cumberland Research Associates, LLC, Fayetteville

Prestige Clinical Research Center, Miami

Advanced Gastroenterology Associates, LLC, Palm Harbor

E Squared Research, Inc., Huntsville

Clinical Research Solutions, Jackson

Mayo Clinic, Rochester

Arkansas Gastroenterology, North Little Rock

Wellness Clinical Research Associates, McKinney

Advanced Clinical Research Associates, Plano

Houston Endoscopy Research Center, Houston

GW Research Inc., Chula Vista

Inland Empire Liver Foundation, Rialto