1 Exhibit 23.3 CONSENT OF WEINGARTEN, SCHURGIN, GAGNEBIN & HAYES LLP We hereby consent to the reference to our firm as it appears in this Registration Statement, including the prospectus constituting a part hereof and any amendments thereof. /s/ Weingarten, Schurgin, Gagnebin & Hayes LLP ------------------------------------------ Weingarten, Schurgin, Gagnebin & Hayes LLP Dated: March 28, 2000