Fahn, S., Oakes, D., Shoulson, I., Kieburtz, K., Rudolph, A., Lang, A., ... Parkinson Study Group.
(2004).Levodopa and the progression of Parkinson's disease. NEW ENGLAND JOURNAL OF MEDICINE.
351(24), 2498-2508.
Zhao, H., & Wang, H.
(2010).Cost and Cost-Effectiveness Analysis With Censored Data. Faries, D. E., Obenchain, R., Haro, J. M., & Leon, A. C. (Eds.),
Analysis of Observational Health Care Data Using SAS.
(pp. 363-382).
SAS Institute.