I have a friend who is a doctor. We regularly tag each other on Facebook posts with articles where a female doctor is referred to by her first name or, possibly, her surname but male doctors will always be referred to as Mr Smith.
eg Claire Smith is a doctor specialising in premature birth and the long-term impacts on babies and their mothers. "Many babies will experience slower development when premature but there is still work to be done to understand how much the shorter gestation plays a part in this," explains Claire.
Vs
Dr James Jones has been operating on rugby players knees for 20 years, including some of the biggest name in England Rugby. "For a player who has been playing rugby at a high level, often since school, the knee experiences significant deterioration," Dr Jones explains.
It's remarkably common. Once you see it, you can't unsee it! My friend tells me that after we started identifying it, she's started politely but firmly correcting people at conferences as it happens a lot. eg panel of 5 doctors, 3 men, 2 women. The men will be called Dr Jones whenever they're asked a question, and the women will be called by their first name.