RT Journal Article SR Electronic T1 Ventricular Septal Defects and Rates of Spontaneous Closure JF AAP Grand Rounds JO AAP Grand Rounds FD American Academy of Pediatrics SP 7 OP 7 DO 10.1542/gr.43-1-7 VO 43 IS 1 YR 2020 UL http://aapgrandrounds.aappublications.org/content/43/1/7.abstract AB