ALS	Amyotrophic lateral sclerosis
MND	Motor neuron disease
WTC	World Trade Center
WTCHP	World Trade Center Health Program
FDNY	Fire Department of the City of New York
EMS	Emergency medical service
CFHS	Career Firefighter Health Study
NIOSH	National Institute for Occupational Safety and Health
EMR	Electronic medical record
NDI	National Death Index
ICD-10	International Classification of Diseases, 10th revision
SD	Standard deviation
RR	Relative rate
CI	Confidence interval
SMR	Standardized mortality ratio