title: Screening for intestinal helminthiasis at pre-employment medical examinations in Nigeria--the economic rationale.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D006373:Helminthiasis / Q000175:diagnosis*; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000175:diagnosis*; D008875:Middle Aged; D009549:Nigeria; D010808:Physical Examination / Q000379:methods*