You may personally present three papers, or two papers and one poster, or one paper and two posters, or three posters at the 18th BCCE (Rule of Three). If you recieve more than three invitations by the symposia organizers to present a paper, you will need to decide which three you will accept. Your name may be listed as a co-author on as many papers or posters as you and your co-authors care to submit. You may present as many workshops as you care to organize and present. An exhibitor may present one paper, or one poster, or one workshop. An exhibitor may present the szme workshop more than once.