A latching device includes a first member, a second member defining a locking slot, and a latching member disposed on the first member for locking on the second member. The test signals include a test input signal, a test output signal, and a test sync signal. The protection circuit is configured to receive an input signal and the boosted voltage and to generate an output signal that changes responsive to changes in the input signal. The biller integration system is a set of software tools that integrate with the biller’s existing billing and accounting systems. A hub assembly rotates about the shaft and interconnects with the electric brake. Corresponding pharmaceutical compositions, methods of treatment, methods of synthesis, and intermediates are also disclosed.