Is there a doctor aboard?
The Lancet 2006; 367:1397-13981 (free registration required)
What happens if 4-5 doctors show up to help a sick patient? Who is in charge among them? Does "Good Samaritan law" apply when the plane is over the Sahara desert?
Are women better or worse doctors than men?
The Lancet 2006; 367:1391 (free registration required)
Image source: OpenClipArt.org, public domain