Effectiveness of multimodal participant recruitment in SPARK, a large, online longitudinal research study of autism - Amy M. Daniels; J. Kiely Law; LeeAnne Green Snyder; Katharine Diehl; Robin P. Goin-Kochel; Pamela Feliciano; Wendy K. Chung; SPARK Consortium (Journal of Clinical and Translational Science, 2024)