Welcome to Walthamstow, North East London's The Firs Medical Center. Schedule an appointment | Purchase prescriptions. The administration intends to hire a licensed nurse on a full-time basis for The Firs Medical Center. We offer an SMS service that enables you to get appointment confirmation and reminders. Our goal was to look into the prevalence and relationships between ED, the use of cognitive enhancers, and the use of psychostimulants among An-Najah National.