In a method and apparatus to separate and transport flexible two-dimensional products, such as paper sheets having an adhesive, the products are supplied via a product supply stack to a separation device. The invention relates specifically to genes encoding NgR protein homologs in humans and mice. The present invention also provides novel liquid pharmaceutical dosage forms for oral administration after constituting the solid pharmaceutical dosage form with water. For example, at least a portion of the cross section may be configured in a shape that acts as a spring and deflects upon loading.