The term endogenous depression is identified in base64 scheme by the sequence ZW5kb2dlbm91cyBkZXByZXNzaW9u, while the MD5 signature is equal to 4d557ccc34524fe8a029eca6ce12b504. The ASCII encoding of endogenous depression in hexadecimal notation is 656e646f67656e6f75732064657072657373696f6e.