One of many sources for this statement is "Shifts in the Foundation of Drug Development," CenterWatch Monthly, January 2004, 8.
13 Tanga atosi epanduvali vokakasia losapi hati, "Ndomo o Pondola Oku Leluisa Omuenyo Wove" Vutala Wondavululi Wevambi Linene wo 2016, kem.