Actigraphy methodology in the Kids Mod PAH trial: Physical activity as a functional endpoint in pediatric clinical trials oleh Catherine M. Avitabile, Usha S. Krishnan, Delphine Yung, Stephanie S. Handler, Nidhy Varghese, Angela Bates, Jeff Fineman, Rachel Sullivan, Grace Friere, Eric Austin, Mary P. Mullen, Carol Pereira, Eric J. Christensen, Gayane Yenokyan, Joseph M. Collaco, Steven H. Abman, Lew Romer, D. Dunbar Ivy, Erika B. Rosenzweig