I covered someone's clinic shift today-- the ICU is slow this week, so they're moving us around as needed. She comes in, she's complaining of chronic knee pain. She's seen two other doctors in the past six months, no one had any answers for her. I'm doing a history.
"What kind of work do you do?"
"I work in a hotel."
"What do you do there?"
"I clean the rooms."
"So you're on your knees a lot?"
"Your knees hurt when you're not at work?"
"No. Just at work."
I think we've found our answer. For this, four years of medical school.