It seems obvious that your friends would agree they are your friends. But recent findings published in the journal PLOS ONE call this into question. Let's take a look at that research.
Biomedical researchers like me probe the mechanistic basis of health and disease. In a long career working at the discovery end of the spectrum, I’ve been privileged to live through, and make some small contribution to, an extraordinary (and continuing) revolution in medical understanding and human well-being.