Who might pay the APC for me? - BMJ Open
https://bmjopen.bmj.com/pages/apcThe Compact for Open Access Publishing Equity is a collection of universities who have pledged their support to establishing durable mechanisms for underwriting the APC-model. Check their website so see if your university is covered. Alternatively contact your librarian to find out what support your institution offers.
FAQs - BMJ Paediatrics Open
https://bmjpaedsopen.bmj.com/pages/faqBMJ Paediatrics Open offers waivers on the APC for authors based in Hinari Group A or B countries. For HINARI Group A there is a 100% waiver; for HINARI Group B there is a 50% waiver. Any paper submitted to the journal before the end of May 2017 will have its APC waived. Check with your institution before paying the APC.
Authors - BMJ Open
https://bmjopen.bmj.com/pages/authorsBMJ Open is an open access journal and levies an Article Processing Charge (APC) of 1,500 GBP (exclusive of VAT for UK and EU authors and GST for Australian and Indian authors) for all article types. There are no submission, colour or page charges. Find out if …