Hi, Vita:<br /><br />Yikes! This stuff is complicated. I've reviewed your paper several times, and I think I've made some worthwhile edits. It reads well to me, but what do I know? Ask my wife.<br /><br />Anyway, please proofread carefully. Although I was careful not to change the content, wonderful though I am, I sometimes make mistakes. Again, ask my wife.<br /><br />It is broiling here in southern Ontario, so if I've missed any typos, I can blame the computer.<br /><br />I'm I&nbsp;awe of your cleverness. How do you focus on L1 and L2 without losing&nbsp;consciousness?<br /><br />Have a great weekend in the highlands.<br /><br />BFN - George<br /><br />&nbsp;<br /><br /><br /><br />&nbsp;