THE SOLE PURPOSE OF THE CORPORATION SHALL BE TO ESTABLISH AND MAINTAIN A HOSPITAL OR HOSPITALS TO PROVIDE DIAGNOSTIC, THERAPEUTIC AND OTHER MEDICAL SERVICES, INCLUDING BUT NOT LIMITED TO, SHORT-TERM AND EXTENDED INPATIENT CARE, OUT PATIENT CARE, AND HOME CARE AT OR FROM PRINCIPAL FACILITIES TO BE LOCATED ON FRANCIS STREET IN BOSTON OR AT SUCH OTHER FACILITIES AS MAY BE AUTHORIZED FROM TIME TO TIME, AND OUT PATIENT CENTERS TO BE LOCATED IN BOSTON AND ENVIRONS, PURSUANT TO THE LAWS OF THE COMMONWEALTH GOVERNING THE SAME, AND INCIDENT TO THE AFORESAID PURPOSES, TO CARRY ON EDUCATIONAL ACTIVITIES AND SCIENTIFIC RESEARCH RELATING TO THE RENDERING OF CARE TO THE SICK OR INJURED AND TO THE PROMOTION OF HEALTH, IN COOPERATION WITH THE MEDICAL SCHOOL OF HARVARD UNIVERSITY AND OTHER EDUCATIONAL AND RESEARCH INSTITUTIONS.