Sadly, Dr. Leir has passed away (http://www.examiner.com/article/dr-roger-leir-researcher-of-alleged-alien-implants-dies). For those of you that don't know him, he was the leader in alien implants. He would remove them from abductees. One of the only doctors that actually took them seriously.
The third video here (http://alien-ufo-research.com/alien-implants/) explains some of the crazy stuff he found.
RIP Roger...