"Good friend" can sign informed consent forms.
D005190:Family; D035082:Federal Government; D033062:Friends; D006076:Government; D033161:Government Regulation; D006805:Human Experimentation; D006801:Humans; D007398:Interpersonal Relations; D007872:Legal Guardians; D012926:Social Control, Formal; D020458:Third-Party Consent; D014481:United States
Biomedical and Behavioral Research; Legal Approach