“…Articles were evenly distributed between qualitative and quantitative study designs. Fourteen studies were qualitative [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ], eleven were quantitative [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ], and five were mixed methods [ 20 , 47 , 48 , 49 , 50 ]. Investigators in six studies completed secondary analyses, four using data from the National Survey of Children with Special Health Care Needs (NS-CSHCN) [ 51 , 52 , 53 , 54 ], one completing a chart review [ 7 ], and one using the Intellectual Disability Exploring Answers (IDEA) database [ 55 ].…”