Hallberg Independent Research*, Trångsund, Sweden
Correspondence and requests for reprints to Örjan Hallberg, MSEE Hallberg Independent Research, Polkavägen 14B, 142 65 Trångsund, Sweden
Tel: +46-8-605 4998; e-mail: [email protected]
Sponsorship: This work was supported by Hallberg Independent Research. The Cancer and Allergy Foundation financially supported the pre-submission editorial review of this paper.
Received 18 November 2005; Accepted 31 December 2005
*This research institution was founded in 2001 and is registered by the Swedish National Patent and Registration Office.