Which of the following scenarios best reflect an appropriate use of grey literature? Select all that apply.
1) Citing a Wikipedia webpage as evidence to support opioid use by patients with rheumatoid arthritis
2) Using the Canadian Stroke Best Practice guidelines on stroke prevention when developing patient education materials
3) Deciding if an over-the-counter multivitamin is beneficial to your client's cardiovascular health based on your exploration of the company's consumer webpage
4) Reviewing the Registered Nurses of Ontario Best Practice Guidelines on adult asthma care to plan patient assessments and interventions