Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
AD = Alzheimer disease; DALY = disability-adjusted life-year; MND = motor neuron disease; MS = multiple sclerosis; PD = Parkinson disease; TTH = tension-type headache.
