S. J. Johnson

Direct costs and survival of medicare beneficiaries with early and advanced Parkinson's disease.

H. Birnbaum, A. Siderowf, A. Kaltenboeck, 2012, Parkinsonism & related disorders.

Injury hospitalizations among American Indian youth in Washington

D. Grossman, M. Sullivan, S. J. Johnson, 1999, Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention.