The present invention is test structures in unused areas of semiconductor integrated circuits and methods for designing the same. Each of the storage circuits may include an input transmission gate to apply any one of a data input and a scan input to a storage element of the storage circuit based on an input circuitry that considers the state of the scan enable signal and a timing signal of a clock associated with the storage element. Preferably the pharmaceutical composition comprises one or more compounds selected from isoindigo, indigo, indirubin, or derivatives thereof, an anti-inflammatory agent, and a pharmaceutically acceptable carrier. The elastic member, configured to restore the mold core to its previous position, is disposed between the mold plate and the mold core. Various embodiments of gas block assemblies and operating rods for gas operating systems for firearms are provided.