Study designs of evaluations included in the review
Case reports of harm were included.
Specific interventions included in the review
Any health-related information on the Internet was eligible for inclusion in the review. Harm associated with e-mail or intentional harm was not excluded.
Participants included in the review
Any persons who had looked for, used and suffered some ill effects from the information obtained via the Internet, were included.
Outcomes assessed in the review
The outcomes were the incidence and nature of adverse effects.
How were decisions on the relevance of primary studies made?
Two of the authors independently evaluated all citations for eligibility, with any disagreements resolved by consensus or by the third author.