POLYMER DERIVATIVES AND POLYETHYLENE GLYCOLDERIVATIVES FOR USE IN THE MANUFACTURE OF THERAPEUTIC AND DIAGNOSTIC AGENTS AND IMAGING AGENTS FOR DIAGNOSTIC PURPOSES; POLYMER DERIVATIVES AND POLYETHYLENE GLYCOLDERIVATIVES FOR USE IN THE MANUFACTURE OF COSMETIC AND PHARMACEUTICAL PREPARATIONS AND SUBSTANCES; POLYMERBEADS FOR USE IN MANUFACTURING; POLYALKYLENE GLYCOLSFOR USE IN THE MANUFACTURE OF THERAPEUTIC AND DIAGNOSTIC AGENTS AND AS IMAGING AGENTS FOR DIAGNOSTIC PURPOSES; LIPOSOMES, PROTEINS AN...