Dear Dr. Joo - As always,&nbsp;I appreciate the&nbsp;privilege&nbsp;of working&nbsp;on your manuscript.&nbsp; I feel that logical organization may be often be an issue with your writing, perhaps what the reviewers are identifying as "unclear".&nbsp; Here I'm somewhat handicapped by not being an SME, but I do make an effort to help you present a coherent and organized document, given the limitations of my understanding of the substance of your field.&nbsp; This involves considerably more complex editing than I do for most authors - I just hope it works for you to achieve your professional goals. RebeccaTDE