When it comes to BHT in Turkey: Dr. Hakan Doganay.
He is an expert in BHT, He performed Beard hair with two of my friends and performed chest hair with me. He is performing manual FUE for BHT exclusively.
You have also some other recommended names such as Dr. Bisanga from Belgium, Dr. Bhatti from India and Dr. Umar for USA (King of BHT).