Cochrane
4.0 kwiinkwenkwezi ezi-5 (ngokusekwe kuphononongo olu-1)
I-Cochrane ngumbutho wesisa waseBritane wehlabathi owenzelwe ukudibanisa ezonyango
Ithegi: medical research
Uvimba weefayili wokurhweba
abo banikelayo mabangaceli nto
abo bamkelayo akufuneki banike mbuyekezo;