It's been awhile since anyone has linked medscape for information. I recommend the site for technical information and the constant updates for treatments. It requires you to sign up for access, but it's free and your information is secure. Some of it's beyond my knowledge, but search engines and the willingness to learn reveals many things that are important in dealing with depression.

medscape.com

One thing Anne points out: Depression is a physical illness. It can't be willed away or ignored because the sufferer feels they are weak if they can't overcome their illness.