1 Division of Pediatric Rehabilitation Medicine, Physical Therapy, Children's Hospital Los Angeles Los Angeles, California Division of Biokinesiology & Physical Therapy, Herman Ostrow School of Dentistry, University of Southern California Los Angeles, California Mother of a child with hypoplastic left heart syndrome Los Angeles, California Division of Biokinesiology & Physical Therapy, Herman Ostrow School of Dentistry, University of Southern California Los Angeles, California.