The Hotline has a mystery to solve and could use the help of any MGHer who can double as an amateur sleuth. Anyone who was watching the ABC-TV show "Who Wants to be a Millionaire?" last week may have noticed that a physician from the MGH was called as a contestant's lifeline. Unfortunately, only the doctor's first name — Alan (Allen?) — was given, not his last name. The Hotline is trying to find this mystery doctor to give him credit for getting the answer right. If any MGHer knows who Dr. Alan (Allen) is, send an e-mail to vbrady@partners.org.