Comparison of HSPA2 immunostaining intensity (lgIOD) in relation to fertile individuals with normal spermatogenesiss (NS, n = 25), hypospermatogenesis (HYPO, n = 18), maturational arrest (MA, n = 20) and Sertoli cell-only syndrome (SCOS, n = 7). Data were analyzed by one-way ANOVA and following Dunnett test