That is because Dr. Gho neglects to submit his findings to be published in medical journals. Without review by other doctors, Gho's theories cannot be tried and evaluated. Certain types of auto-immune diseases, such as alopecia areata can now be treated by means of hair transplant techniques by using the donor strip method. How loose your scalp is helps to decide how many grafts can be done just as hair density does. 4. Coarse hair will cover more area. When your hair transplant is done, the surgeon will be able to use fewer hair follicles per graft if your hair is coarse. That is because coarse hair provides more coverage. Hair transplant methods have to take this fact into account. When doctors do hair transplant surgery to replace eyebrows, they have to make sure that they put the hairs in so that they will point in the natural hair direction. For this, the surgeons use very fine gauge needles. They must also use this to help the hair to lie flat. A follicular unit is a single entity that is made up of several parts. All these parts are necessary to the whole. The first part, and the one most people getting hair transplant surgery are interested in, is the hairs. There should be one to four full hair follicles in the unit and one or two fine hairs as well. He may take a good deal of time tweaking the placement of grafts before he is satisfied that they are all set properly into their receptor sites in a pleasing fashion. When he gives the ok, the surgical technicians again take over the patient's care. The grafts will be more permanently set into place when the technicians dry them by blowing a cool blow dryer across them. Hair transplant can be a time-consuming commitment. Treatment can often last one to two years. Mega-sessions where thousands of grafts are done in one sitting help to shorten the overall time. However, the length of these sessions is often grueling. 5. Hair transplant surgery may be combined with other procedures.