I continually get calls from this number reporting to be from Harvard Medical School that wants me to participate in a study about Mens Health. They say they selected my number at random. I've never called them back, but they continue to call. What's so special about me that they need to keep calling? That's why I think it's a scam.

Same as Kurt reported. Several calls a week asking to participate in health study. Have received calls for the last 3 weeks.

2078737320 called my mobile, left no message.

Got a call claiming they were a duke university medical research study on health and brain tumors. Identified themselves as Kreider Research. the say they will mail information. I suppose, then I'll find out more.
but like above, possible scam, possible identity thieft.

This phone number is a line for one of the calling stations at Kreider Research. We are a legitimate business that is hired by various medical institutions to find participants for important health studies. We call randomly selected phone numbers to reach a random sample of the population (so we do not bias the study). We can provide contacts at these institutions to confirm that we are conducting legitimate medical research studies for them. Please call us at (888) 522-7427 so that we can explain about the study your number has been randomly selected for.