20 % of responses were independently coded by a researcher unaware of the study aims.
All observers were unaware of the study design.
All data were recorded concurrently in a computerized stroke rehabilitation data bank by rehabilitation team members unaware of the study hypothesis.
Final diagnosis was assigned by treating cardiologists unaware of the study.
All subjects were unaware of the study aim and had never experienced magnetic stimulation before.
Physicians were unaware of the study and thus provided an unbiased assessment of the disease prevalence in this region.
The ECG was analysed by the cardiologist on duty, who was unaware of the study and blinded to the three risk scores.
To avoid potential bias, an independent observer, who was a trained musculoskeletal radiologist uninvolved in patient care and unaware of the study objectives, evaluated the radiographs.
Throughout the period of data collection, the family physicians were unaware of the study going on outside their doors.
Two expert judges, unaware of the study rationale and blind to the experimental conditions, assessed all the recordings for each foetus.
All investigations were performed in a blinded manner, i.e. the observer was unaware of the study group the animal belonged to.
