BZD	Benzodiazepines
CBT	Cognitive behavioral therapy
CI	Confidence interval
COPD	Chronic obstructive pulmonary disease
DA	Disease analyzer
EMR	Electronic medical record
GP	General practitioner
HR	Hazard ratio
ICD	International Statistical Classification of Diseases and Related Health Problems
n	Number of observations
Nx4	Neurexan
OTC	Over-the-counter
SD	Standard deviation
SES	Socio-economic status
SMD	Standardized mean difference