I am going through a treatment for hair loss. Derma roler, accupunture, laser comb. Now they have advised for Scalp biopsy, Hemoglobin, S.Ferritin. Free T3, Free T4, TSH, and S Prolactin test. Please let me knw the reason they r suggesting me these tests now? (why not bfore starting the treatment ). N wht could be the approx cost fpr these test?