Table 1: Concepts searched and the keywords related to these concepts.

Concept	Keywords
Lateral epicondylitis	Lateral elbow tendinopathy OR Lateral epicondylitis OR Tennis elbow OR Extensor tendonitis OR Extensor tendinosis OR Extensor tendinopathy OR Lateral elbow OR Fathers of the Bride's elbow OR Enthesopathy OR Epicondylosis
Treatment	Light Therapy OR Therapeutic Laser OR Low Level Laser Therapy OR Low Power Laser Therapy OR Low Level Laser OR Low energy Laser OR Soft Laser OR Low intensity level laser OR Low intensity OR laser therapy OR photo biostimulation laser OR photobiomulation laser OR medical laser OR laser therapy OR biostimulation laser OR bioregulation laser
Systematic Review	Systematic review OR Meta-analysis