Medical trips to Gambia, West Africa?

Hi all,

I am wondering if anyone on here knows of any humanitarian medical organizations that do preferably short-term trips to The Gambia, West Africa?

I was a Peace Corps volunteer in Gambia and, as I am now a Registered Nurse, I am hoping to couple a return visit to the country with a volunteer medical trip as well.

Have you heard of any groups that have recently traveled and worked there?

Thanks!