Histology	hTERT mRNA NhTERT (median) 25th percentile,  75th percentile (range)	hTR NhTR (median) 25th percentile, 75th percentile (range)
OA     n=12	127.2 104.2, 140.3 (80.5-246.7)	212.6 125.3, 516.0 (65.8-770.0)
MA     n=14	39.0 25.0, 70.4 (13.1-83.9)	81.7 79.8, 139.0 (62.6-192.0)
SCOS n=12	2.2 0.0, 5.3 (0.00-7.20)	47.6 35.8, 97.6 (32.4-136.0)

Note: hTERT=human telomerase reverse transcriptase; N_hTERT=hTERT mRNA copies sample/(porphobilinogen deaminase (PBGD) mRNA copies sample/1000). 
hTR=human telomerase RNA; N_hTR=hTR copies sample-hTR copies sample (minus RT-controls)/PBGD mRNA copies sample.
MA=maturation arrest  (Johnsen score 3-5); OA=obstructive azoospermia with normal gametogenesis; SCOS=Sertoli-cell-only syndrome.