1. Prostate Specific Antigen Doubling Time as Auxiliary End Point in Hormone Refractory Prostatic Carcinoma 
Hans-Peter Schmid, Rudolf Morant, Jürg Bernhard, Rudolf Maibach 
European Urology 
Volume 43, Issue 1, Pages (January 2003)
DOI: /S (02)

2. Fig. 1
Correlation of prostate specific antigen (PSA) doubling time to objective response in patients with measurable metastases. Bars represent individual patients. Asterixes denote median values of PSA doubling time in each of the three response categories.
European Urology  , 28-30DOI: ( /S (02) )