Table 2 Inclusion and exclusion criteria

• Articles of any type of prospective research design,

• Articles published in trade magazines,

• Articles published in English,

• Letters to the Editor, Commentaries,

• Articles published in a peer-reviewed journal, and

• Articles not published in English, and/or

• Articles that contain data on chiropractors' opinions toward medication prescription rights.

• Articles not specific to the topic of chiropractors' opinions toward medication prescription rights.