Keywords / Indexing informationnon-invasive brain stimulation; NIBS; neuromodulation safety; brain stimulation side effects; adverse effects; safety monitoring; adverse event reporting; side effect questionnaire; repeated-measures questionnaire; session-by-session assessment; within-subject monitoring; TMS; transcranial magnetic stimulation; rTMS; iTBS; cTBS; theta burst stimulation; tES; transcranial electrical stimulation; tDCS; transcranial direct current stimulation; tACS; transcranial alternating current stimulation; tRNS; transcranial random noise stimulation; tUS; transcranial ultrasound stimulation; focused ultrasound neuromodulation; tolerability; acceptability; headache; scalp discomfort; tingling; pain; fatigue; dizziness; nausea; auditory effects; seizure risk; skin irritation; mood effects; cognition; clinical neurostimulation; research methods; psychometrics; harmonized instrument; cross-modality comparison