Well, here's what I know. If the nurse does'nt know how to give T shots, then, yea, look elsewhere. I always inject into the thigh muscle. Bigger target. There have also been times that the T does come back out, but it has never been a problem. I find it usually happens when I don't first, loosen up the muscle. (Usually by doing some deep breathing exercise.) And, when that happens, I still stay on the same schedule.
Not sure if that helps.