Which first pediatric act offers a 6-month patent extension for manufacturers if clinical trials are conducted on children on already existing drugs that could be potentially used in them? A. Prescription Drug User Fee Act (PDUFA - 1992) B. Food and Drug Administration Modernization Act (FDAMA - 1997) C. Pediatric Research Equity Act (PREA - 2003) D. Best Pharmaceutical for Children Act (BPCA - 2002)