This week, guest host Dr. Dave Slawson joins Henry and Mark. We discuss rapid (< 2 hr) protocols for ruling out MI (https://www.ncbi.nlm.nih.gov/pubmed/31242362); whether tramadol is as safe as it's cracked up to be (https://www.ncbi.nlm.nih.gov/pubmed/31088782); and steroids for pneumonia (https://www.ncbi.nlm.nih.gov/pubmed/29937237). Plus the quiz, and Mark reviews two clinical prediction rules for PE (PERC and YEARS).