Please follow http://www.nsf.gov/publications/ods/results.jsp?TextQuery=Dear+Colleague+Letter&timeframe=restrict+timeframe+to%3A&docType=Program+Announcements+%26+Information&docSubtype=Biology&Current_status=Current&sort_order=doc_nsf_pub_date&isnewwindow=0&imageField.x=49&imageField.y=12.

Please follow http://www.nsf.gov/publications/ods/results.jsp?TextQuery=Dear+Colleague+Letter&timeframe=restrict+timeframe+to%3A&docType=Program+Announcements+%26+Information&docSubtype=Biology&Current_status=Current&sort_order=doc_nsf_pub_date&isnewwindow=0&imageField.x=49&imageField.y=12.