作者单位:Rutgers State Univ, New Jersey Med Sch, Dept Phys Med & Rehabil, BHSB F1557,183 South Orange Ave[1]Univ Chile, Dept Pediat, Hosp Clin San Borja Arriaran, Santiago, Chile[2]Univ Nacl Asuncion, Fac Ciencias Med, Hosp Clin, Dept Cardioresp Rehabil, San Lorenzo, Paraguay[3]