A signal scrambling method is provided for peak-to-average power ratio reduction of STBC MIMO-OFDM signals in a MIMO-OFDM system having Y transmit antenna. The front plate has a pivot hole defined in a lateral side thereof the front plate, and a block and a stopper both arranged on a common inner wall of the pivot hole. The client is assumed to support only two basic cryptographic functions: signing of arbitrary data by using a public key algorithm together with a one way hash function, and verifying a public key signature of arbitrary data. A second set of tokens is then assigned to represent a plurality of unique combinations of the samples. In particular, the present invention is directed to a method of treating unconjugated hyperbilirubinemia by UGT1A1 induction comprising the step of administering to a subject an effective amount of ritonavir.