website introduction：United States国立卫生研究院(简称NIH)是United States最高水平的Medicine与行为学研究Agency，初创于1887年，任务是探索生命本质和行为学方面的基础Knowledge，并充分运用这些Knowledge延长People类寿命，以及预防、诊断和治疗各种疾病和残障。NIH在近几十年取得的研究成果极大的改善了People类的生命Health状况。
website introduction：National Library of Medicine's medline and pre-medline database.
website introduction：Clinical experts provide current medical information and news on health topics.
website introduction：NIH repository for peer-reviewed primary research reports in the life sciences. View the full text of articles online.
website introduction：Features medical journal articles, images, case reports, medical news, free Medline, CME, and drug searching.
website introduction：HealthGrades是 one 家医疗质量在线评定和ServicesCompanies，此次它依照26项医疗标准程序和条件对 one 亿四千万份病历严格筛选评定的前50强医院,在过去的11年里都向Society提供了优质而持久的医疗Services。
website introduction：[USA] A not-for-profit organization serving members in several states and Washington, DC. It operates as a working partnership of two organizations: Kaiser Foundation Health Plan and Hospitals, and the Permanente Medical Groups.
website introduction：Find medical professionals, in your area, and book an appointment.
website introduction：Dedicated to helping persons who face cancer. Supports research, patient services, early detection, treatment and education.
website introduction：A nonprofit forum. We help students become doctors: from audiology to veterinary medicine.
website introduction：Electronic version of the BMJ. Publish accessible information that will help doctors improve their practice and will influence the international debate on health. Access is free to all.
website introduction：Offers health and specialty information, research and clinical trials, news, and educational programs.
website introduction：Find, rate or check up on a doctor in the United States. Search by location, specialty or ailment.nt.
website introduction：Network of hospitals and doctors serving more than 100 communities in Northern California. Includes health information and locator for hospitals, physicians and services.
website introduction：A weekly journal that publishes articles on new medical research findings, reviews, and other editorials.
website introduction：Site has a comprehensive search function to locate any information related to the institutions. (Baltimore)
website introduction：American Academy of Family Physicians represents more than 94,000 family physicians, family medicine residents, and medical students.
website introduction：Providing services, including genomic testing, through a network of primary testing locations. Includes information on continuing medical education and connectivity solutions.
website introduction：Their mission is to prevent and cure diabetes and to improve the lives of all people affected by this disease. Available in English and Spanish.
website introduction：Searchable database which provides patients, family members and the public with information about current ongoing clinical research studies. From the U.S. National Library of Medicine.
website introduction：A not-for-profit organization which includes hospitals, health plans, clinics, physicians, long-term care facilities, low-income housing, assisted living, home care, and hospice, advanced medical research and education, and community outreach programs in Alaska, Washington, Oregon, and California.
website introduction：Search for a doctor in the United States, by name, location or specialty.
website introduction：Nonprofit group of medical schools, teaching hospitals, and academic societies. Provides assistance for members in the areas of education, research, and patient care.
website introduction：Provides services and products to health care providers and payors including pharmaceuticals and supplies to sophisticated medical workflow solutions.
website introduction：The national Alzheimer s Association. Provides information about Alzheimer s disease, resources, research advances, publications, and events includes contact information and links to local AA chapters all over the United States.