Laboratory analysis
LH and FSH levels were analyzed at Sahlgrenska University Hospital using a high-resolution chemiluminescence microparticle immunoassay method with a detection threshold of 0.1 mIU/ml. Prepubertal and pubertal testosterone levels were analyzed at the pediatric endocrine laboratory at Gothenburg Eastern Hospital using a sensitive high-resolution modified radioimmunoassay with a sensitivity of 0.03 nmol/L (