The editors welcome discussion of the technical content of PCI Journal papers. Comments must be confined to the scope of the paper to which they respond and should make a reasonable and substantial contribution to the discussion of the topic. Discussion not meeting this requirement will be returned or referred to the authors for private reply. Discussion should include the writer’s name, title, company, city, and email address or phone number and may be sent to the respective authors for closure. All discussion becomes the property of PCI Journal and may be edited for space and style. Discussion is generally limited to 1800 words with each table or illustration counting as 300 words. Follow the style of the original paper and use references wherever possible without repeating available information. The opinions expressed are those of the writers and do not necessarily reflect those of PCI or its committees or councils. Discussion items should be submitted by email to journal@pci.org within a year of the publication of the paper to which they respond.