title: Leadership: a simple definition.
authors.affiliation: Marc R. Summerfield, M.S., is President, Summerfield Consulting, Bel Air, MD (summsum@verizon.net).
authors.forename: Marc R
authors.initials: MR
authors.lastname: Summerfield
mesh_terms: D006801:Humans; D007857:Leadership; D010593:Pharmaceutical Services / Q000458:organization & administration; D010595:Pharmacists / Q000458:organization & administration*; D024382:Professional Role