EP 1 499 941 B1 REFERENCES CITED IN THE DESCRIPTION This list of references cited by theapplicant is forthe reader’s convenience only.It does not form part of the European patent document. Even though great care has been taken in compiling the references, errorsor omissions cannot be excluded and the EPO disclaims all liability in this regard. Patent documents cited in the description • US 2002029352 A1  [0008] • US 5642388 A  [0009] • US 5940786 A  [0010] • US 546951 A  [0011] 13