1998
January January; 18 (1): 1 - 145	February February; 18 (2): 147 - 330	March March; 18 (3): 331 - 502
April April; 18 (4): 503 - 676	May May; 18 (5): 677 - 851	June June; 18 (6): 853 - 1020
July July; 18 (7): 1021 - 1198	August August; 18 (8): 1199 - 1358	September September; 18 (9): 1359 - 1515
October October; 18 (10): 1517 - 1670	November November; 18 (11): 1671 - 1827	December December; 18 (12): 1829 - 1991