|Original language||English (US)|
|Number of pages||13|
|State||Published - Oct 2003|
Bibliographical noteFunding Information:
The authors are grateful to George Witman for his original observations that stimulated this research, and to him, Linda and Brad Amos, David Albertini, Eric Eccleston, Edward Egelman, David Hamilton, Christer Höög, Ritsu Kamiya, Pete Lefebvre, George Palade, Mary Porter, Carolyn Silflow, Walter Steffen, Ray Stephens and Sid Tamm for constructive criticism and stimulating interactions. The authors’ work was mostly supported by United States Public Health Service Grant GM35648, and by National Science Foundation Research Training Group Grant DBI-9602237.