2000
January January; 90 (1): 1 - 235	February February; 90 (2): 237 - 504	March March; 90 (3): 505 - 773
April April; 90 (4): 775 - 1010	May May; 90 (5): 1011 - 1255	June June; 90 (6): 1257 - 1469
July July; 91 (1): 249 - 250	August August; 91 (2): 255 - 503	September September; 91 (3): 505 - 769
October October; 91 (4): 771 - 1046	November November; 91 (5): 1047 - 1316	December December; 91 (6): 1317 - 1573