What is the fine-grained topic of the following text: Dr Chahal is an experienced endocrinologist in all aspects of Endocrinology and Diabetes including thyroid, adrenal, prolactin and pituitary diseases, obesity, polycystic ovarian syndrome (PCOS), hirsutism, type 1 and type 2 diabetes and complications, parathyroid, calcium, vitamin D and bone metabolism, lipid disorders, hypertension, cardiovascular risk reduction and neuroendocrine tumours. Only return the topic.
Dr. Chahal's expertise in Endocrinology and Diabetes