CARY, N.C.--(BUSINESS WIRE)--Cetero Research, a world leader in early clinical, bioanalytical, and niche late stage research services announces Ramon Vargas, MD, MPH, FACCP, as the new Medical Director at Cetero’s St. Charles, MO, facility and Robert Cooper, MD, and Gregory Haugen, MD, as Principal Investigators at their Fargo, ND, facility.