Table 1. Treatment paradigm for neurite growth/regrowth assessment.

Treatment Groups	Treatment from 0 to 24 h	Treatment from 24 to 72 h
72 h (C)	Control	Control
72 h (C+M)	Control + Mor	Control + Mor
72 h (C+M+N)	Control + Mor + Nal	Control + Mor + Nal
72 h (H)	HIV	HIV
72 h (H+M)	HIV + Mor	HIV + Mor
72 h (H+M+N)	HIV + Mor + Nal	HIV + Mor + Nal
24 h (H) then 48 h (C)	HIV	Control
24 h (H+M) them 48 h (C+M)	HIV + Mor	Control + Mor
24 h (H+M+N) then 48 h (C+M+N)	HIV + Mor + Nal	Control + Mor + Nal

Control  =  Control_sup; HIV  =  HIV⁺ _sup (p24 = 25 pg/ml); Mor  =  morphine sulfate (500 nM); Nal  =  naloxone (1.5 µM).