Healthy volunteers were screened after giving informed written consent [34].
Twenty-four undergraduates (12 male and 12 female, mean age 20 years 3 months) participated after giving informed written consent.
All subjects participated after giving informed written consent.
Patients were included after giving informed written consent (next-of-kin assent in encephalopathic patients).
After giving informed written consent to participate on a voluntary basis, patients were included in this study.
This study was approved by the Institutional Review Board of our clinics, and patients were included in the study after giving informed written consent.
After giving informed consent, a standardized questionnaire was used to collect information on demographics, medical history, profession and the HBV immunization status of all the participants.
When someone met the inclusion criteria he or she received written and oral information about the study purpose and procedures and was enrolled after giving informed consent.
Twenty patients with CRPS-1 were consecutively enrolled in the study after giving informed consent.
All subjects participated after giving informed consent.
After giving informed consent, participants completed a friendship questionnaire at the Penn Laboratory for Experimental Evolutionary Psychology.
