RT Journal Article SR Electronic T1 Age at School Entry and ADHD Diagnosis JF AAP Grand Rounds JO AAP Grand Rounds FD American Academy of Pediatrics SP 27 OP 27 DO 10.1542/gr.41-3-27 VO 41 IS 3 YR 2019 UL http://aapgrandrounds.aappublications.org/content/41/3/27.abstract AB