Tex. Occupations Code § 255.0066

(a) If the preliminary investigation under Section 255.006(a) indicates that an act by a license holder falls below an acceptable standard of care, the complaint shall be reviewed by an expert panel authorized under Section 255.0065 consisting of license holders who practice in the same specialty as the license holder who is the subject of the complaint or in another specialty that is similar to the license holder's specialty.

(b) The expert panel shall report in writing the panel's determinations based on the review of the complaint under Subsection (a). The report must specify the standard of care that applies to the facts that are the basis of the complaint and the clinical basis for the panel's determinations, including any reliance on peer-reviewed journals, studies, or reports.