compute_wls_error	compute_wls_error
conduct	conduct
event_fun	event_fun
Experimental	Experimental
generate_pe	generate_pe
get.optimal_2arm_piecewise	get.optimal_2arm_piecewise
getoc_2arm_piecewise	getoc_2arm_piecewise
rtrunc_gamma	rtrunc_gamma
SOC	SOC
trunc_gamma_para	trunc_gamma_para
TTOT_fun	TTOT_fun
Two_stage_sample_size	Two_stage_sample_size
