Parent-reported measure of repetitive behavior in Phelan-McDermid syndrome oleh Siddharth Srivastava, Emma Condy, Erin Carmody, Rajna Filip-Dhima, Kush Kapur, Jonathan A. Bernstein, Elizabeth Berry-Kravis, Craig M. Powell, Latha Soorya, Audrey Thurm, Joseph D. Buxbaum, Mustafa Sahin, Alexander Kolevzon, on behalf of Developmental Synaptopathies Consortium