1999
January January; 88 (1): 1 - 236	February February; 88 (2): 237 - 471	March March; 88 (3): 475 - 697
April April; 88 (4): 701 - 967	May May; 88 (5): 971 - 1195	June June; 88 (6): 1197 - 1430
July July; 89 (1): 1 - 268	August August; 89 (2): 271 - 539	September September; 89 (3): 541 - 807
October October; 89 (4): 811 - 1071	November November; 89 (5): 1075 - 1335	December December; 89 (6): 1337 - 1593