Table 1. Study animal demographics information.

Characteristic
Species	Rhesus macaque n = 1,006; Cynomolgus macaque n = 50
Age range	0.04–25.56 years old
Body condition score (BCS) range	1.5–5.0
Sex	Male n = 616; Female n = 440
Infection status at time of peripheral lymph node biopsy	SIV/SHIV infected n = 1,340 procedures; uninfected n = 890 procedures
Infection status at time of laparoscopic biopsy	SIV/SHIV infected n = 861 procedures; uninfected n = 538 procedures

Demographics information for macaques assigned to this retrospective study. Note that most animals received multiple PLN and laparoscopic biopsies during the time period examined.