Trained research staff abstracted all charts using a standardized form, and the research group met weekly to discuss data collection and resolve abstraction issues.
Using a standardized data collection form, trained research nurses abstracted information regarding the patient care activities administered by the critical care nurses.
The input dataset of mouse brain images were contributed by the Allen Institute for Brain Science and other research organizations using a standardized protocol.
Trained research assistants using a standardized questionnaire interviewed patients.
All non-laboratorial variables are obtained using a standardized form developed specifically for the research.
Each transcript was coded by at least two members of the research team using a standardized coding form.
Physical examination of the hand joints was performed by trained research nurses, using a standardized scoring form.
At each scheduled interview, trained research associates, using a standardized instrument in either English or Spanish, obtained information about housing status, medical service utilization, HIV risk behaviors, antiretroviral medication use, substance use, addiction severity, and depressive symptoms.
CE and NR (both social scientists) initially coded the data using a standardized agreed approach, and the wider research team (which included a health economist, dentists, a sociologist and a psychologist) participated in data sessions to discuss emergent codes.
For the remaining patients, trained and authorized medical students collected additional information on comorbidity, primary reason of admission, complications and rest symptoms of varicella out of the medical record using a standardized form, under supervision of a research physician.
