Merck opts for shake-up to clear drug pipeline.
D035843:Biomedical Research / Q000191:economics / Q000639:trends*; D004345:Drug Industry / Q000191:economics* / Q000639:trends*; D006801:Humans; D007783:Lactones / Q000191:economics; D013373:Substance P / Q000031:analogs & derivatives / Q000494:pharmacology; D013450:Sulfones / Q000191:economics; D014612:Vaccines / Q000191:economics
D007783:Lactones; D013450:Sulfones; D014612:Vaccines; C116926:rofecoxib; D013373:Substance P