title: Letter: Avoiding pitfalls in genetic studies.
mesh_terms: D001789:Blood Group Antigens; D002648:Child; D002675:Child, Preschool; D002802:Cholinesterases; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008661:Metabolism, Inborn Errors / Q000235:genetics*; D010334:Paternity; D012106:Research
chemical_list: D001789:Blood Group Antigens; D002802:Cholinesterases