A method of modulating cell proliferation or apoptosis comprising modulating psoriastatin activity. A web-monitoring tool monitors each web navigation sequence of web navigation sequences performed by each user while browsing the web pages of the web site. In particular, a network responds to these commands from the controller to selectively provide signal samples from a device under test. The web browser client is operative to receive the software system and the associated content via the server system, to process the software system and the associated content to produce at least one window object within the content manifestation environment.