human 22 Article 21 Humans 16 Privacy-preserving techniques 16 controlled study 12 adult 11 Privacy preserving 10 female 10 male 10 procedures 9 Federated learning 8 privacy 7 Adult 6 Forestry 6 heart failure with preserved ejection fraction 6 preservation 6 Male 5 Privacy 5 diagnostic imaging 5 major clinical study 5 physiology 5 Data mining 4 Differential privacies 4 Ecosystems 4 Female 4 Historic preservation 4 Internet of things 4 Learning systems 4 Privacy preservation 4 aged 4