BMJ

BMJ Group is a British publisher of medical journals, and healthcare knowledge provider of clinical decision tools, online educational resources, and events. Established in 1840, the company is owned by the British Medical Association.

From the Wikipedia article “BMJ (company)”, licensed under CC BY-SA 4.0.

Large trade publishers generally accept manuscripts only through literary agents, while many independent and small presses accept direct submissions during reading periods. Before submitting anywhere, read the publisher's current guidelines, study recent books on its list, and never pay a reading or publishing fee to a traditional publisher.