A comparative study of p53 promoter hypermethylation in Arsenic induced cancer in two different tissue compartment of the body: Cancer biopsy tissue and blood.

A communication device, such as a telephone or a facsimile device, includes an input device for inputting code information for a call to be transmitted through a communication network, a transmitting device for transmitting dual-tone multiple frequency (DTMF) signals to the communication network according to the code information, and a transmission control device for controlling transmission parameters of a DTMF signal. At least one of a plurality of parameters, including signal transmission time, signal pause time, and signal transmission level, is made different by the transmission control device for a DTMF signal transmitted during the call by the transmitting device after the execution of a dialing input from the communication device to the communication network.