The present invention relates to a vaginal suppository comprising an inert vehicle and lactic acid or a salt thereof for the treatment andor prophylaxis of disorders in the urogenital tract. Suitably, the particles of the controlled release scale inhibitor comprise an esterifiable scale inhibitor cross-linked with a polyol via ester cross-links. A cushion is removably attachable to the frame such that the cushion and frame are repeatably engagable with and disengagable from one another. The control and feedback unit electrically connect to the feedback controlled LED driving circuit, providing PFC, step dimming or color temperature adjustment for driving the LED light-emitting element and detecting a feedback signal of the LED driver circuit for controlling an output current of the LED driver circuit or providing protective measures. The control unit is configured to use the consist change information to generate an updated stored consist configuration data set, and to generate additional, second control signals for controlling at least one of the first vehicle or the vehicle consist based on the updated stored consist configuration data set. Methods for limiting, distributing and using a limited use card number, controlling the validity of a limited use credit card number, conducting a limited use credit card number transaction and providing remote access devices for accessing a limited use credit card number are also provided.