Electrodes for external defibrillators; Electrodes for medical use; Cardiac electrodes; Cardiac defibrillation electrodes; Electroencephalography kit consisting of an electrode headset, a digital recorder and transmitter, a tablet computer monitor, and instructions for use in medical settings including emergency departments, ambulances, intensive care units, and physician's offices; Electrotherapy stimulation apparatus comprising electrical nerve and muscle stimulators, tens units for use wit...