Today we talk about stem cell injections for osteoarthritis (https://www.ncbi.nlm.nih.gov/pubmed/29099618), a rant about mortality outcomes in cancer screening from Mark, omega-3 oils for primary prevention (https://www.ncbi.nlm.nih.gov/pubmed/30415637), and testosterone for depression in men (https://www.ncbi.nlm.nih.gov/pubmed/30427999).