* Data file:  addicts_sub.dat
*
* survival data matrix for westmead study - missing doses
* follow-up until 1/1/89 but corrected during 1/7/90 follow-up
* Column 1: Addict ID
*        2: Clinic (0 or 1)
*        3: Censor status (0=censored, 1=complete)
*        4: Survival time (days)
*        5: Sex (0=male, 1=female)
*        6: Age
*        7: Employment status (0=unemployed, 1=employed)
*        8: History of benzodiazepine/barbiturate abuse (0=no, 1=yes)
*        9: History of amphetamine/cocaine abuse (0=no, 1=yes)
*       10: History of alcohol abuse (0=no, 1=yes)
*       11: Maximum dose
*       12: Age in categories (1= "< 25", 2="[25,29]", 3= "> 29")
*       13: dose in categories (1= "<= 59", 2="[60,79]", 3=">79")