create_arm              Create an 'arm' object
create_arm_lachin       Create a 'lachin' object
daccr                   Accrual
dloss                   Loss to follow-up
dmaxU                   Maximum observed time
dminimaxU               Minimax observed time
dsurv                   Survival
exp_duration            Expected duration
exp_events              Expected number of events
per2haz                 Convert exponential parameters
power_two_arm           Power
simulate_arm            Simulate complete data for a single arm
simulate_trial          Simulate a clinical trial
size_two_arm            Sample size
