* Palo Alto Medical Foundation: http://pamf.org , with links to its Facebook, Twitter and YouTube pages
* Stanford Hospital & Clinics: http://stanfordhospital.org , with links to Facebook, Twitter and YouTube
* VA Palo Alto Health Care System: http://www.paloalto.va.gov , with links to Facebook, Twitter and YouTube
* Stanford Moyamoya Center: http://neurosurgery.stanford.edu/moyamoya/ , with a link to Facebook
* Health Care Social Media Silicon Valley: http://www.facebook.com/home.php#!/hcsmSV
People who tweet about particular health issues or take part in Twitter chats often include a hashtag (hash mark followed by a few letters), which you can then search for. Health-related hashtags include: #hcsm (health care and social media), #hpm (hospice and palliative care) and #dsma (diabetes).