[1] Johns Hopkins Univ, Sch Med, Dept Pathol, Baltimore, MD 21205 USA
[2] Pamantasan Ng Lungsod Ng Maynila, Coll Med, Manila, Philippines
[3] Cardinal St Med Ctr, Dept Internal Med, San Juan, Philippines
[4] Univ Santo Tomas, Fac Med & Surg, Manila, Philippines
[5] Univ Philippines Manila, Coll Med, Manila, Philippines
[6] Univ Verona, Sect Clin Biochem, Verona, Italy
[7] Cincinnati Childrens Hosp & Med Ctr, Div Nephrol & Hypertens, Dept Pediat, Cincinnati, OH USA
[8] Univ Rey Juan Carlos URJC, Dept Phys Therapy Occupat Therapy Phys Med & Reha, Madrid, Spain