Table 2.

PECO statements.

SR-A. Systematic review of studies on RF-EMF exposure from wireless phone use
Population	Members of the general population, without restriction on sex, age, or other individual characteristics.
Exposure	Definition: Near-field RF exposure from personal use of mobile or cordless phones, occurring prior to outcome, and based on indirect measures (subscriber status, self-reported history of mobile phone or cordless phone use), traffic data, or modelling.
	Classification: Ever exposed; time since first exposure; cumulative exposure level.
Comparator	Never or non-regular users of wireless phones.
Outcomes	Critical: Glioma/brain cancer in adults; paediatric brain tumours; meningioma; acoustic neuroma; pituitary gland tumours; salivary gland tumours.
	Important: Any other neoplasm.
SR-B. Systematic review of studies on environmental exposures to RF-EMF
Population	Members of the general population, without restriction on sex, age, or other individual characteristics.
Exposure	Definition: Far-field RF exposure from radio-television transmitters, base stations or any other fixed-site transmitter, occurring prior to outcome, and based on measurements, modelling, or geocoded distance to the sources (the latter limited to broadcast transmitters).
	Classification: Ever exposed; duration of exposure or time since first exposure; average or cumulative exposure level.
Comparator	No or low-level exposure from environmental sources of RF-EMF.
Outcomes	Critical: Childhood leukaemia, paediatric brain tumours, glioma/brain cancer in adults, and leukaemia in adults.
	Important: Any other neoplasm.
SR-C. Systematic review of studies on occupational exposures to RF-EMF
Population	Occupationally active individuals, with no further restriction on sex, age, or other individual characteristics.
Exposure	Definition: Near- or far-field RF exposure from professional use of hand-held transceivers or RF-emitting equipment in the workplaces, occurring prior to outcome, and based on measurements, estimates of exposure level from job- or source-exposure matrices (JEM, SEM), or indirect measures such job title or task (option limited to studies explicitly aimed at assessing the effect of exposure to well-characterized sources and types of RF-EMF).
	Classification: Ever exposed; exposure frequency; exposure duration or time since first exposure; average or cumulative exposure level.
Comparator	No or low-level occupational exposure to RF-EMF.
Outcomes	Critical: Glioma/brain cancer, leukaemia.
	Important: Any other neoplasm.