title: Commentary on paper by Chong et al. "How many infants are temperamentally difficult?" 40 (2015) 20-28.
authors.affiliation: Clinical Professor of Pediatrics, The Children's Hospital of Philadelphia, United States.
authors.forename: William B
authors.initials: WB
authors.lastname: Carey
authors.affiliation: Behavioral-Developmental Initiatives, Scottsdale, Arizona, United States. Electronic address: smcd@b-di.com.
authors.forename: Sean C
authors.initials: SC
authors.lastname: McDevitt
mesh_terms: D000067290:Behavior Rating Scale / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D011795:Surveys and Questionnaires; D013694:Temperament / Q000145:classification*