You should never get your hopes up. If it ends up working, then you can be happy.
http://www.ncbi.nlm.nih.gov/pubmed/10888476
https://www.google.com/search?q=site%3Ahttp%3A%2F%2Fwww.ncbi...
http://www.ncbi.nlm.nih.gov/pubmed/10888476
https://www.google.com/search?q=site%3Ahttp%3A%2F%2Fwww.ncbi...
Probably the best option is to get out into the sunlight and get the sun on your skin, if the sun is high enough.
> "You should never get your hopes up"
/facepalm