For some individuals, especially younger users, signs of dependence may appear even sooner due to heightened sensitivity in the brains reward system
Emerging optical methods for endoscopic surveillance of Barretts oesophagus

Chevrolet Camaro Years: 1967 (67), 1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72), 1973 (73), 1974 (74), 1975 (75), 1976 (76), 1977 (77), 1978 (78), 1979 (79), 1980 (80), 1981 (81) Chevrolet Chevelle / El Camino / Malibu Years: 1964 (64), 1965 (65), 1966 (66), 1967 (67), 1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72), 1973 (73), 1974 (74) Pontiac Firebird / Trans Am Years: 1967 (67), 1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72), 1973 (73), 1974 (74), 1975 (75), 1976 (76), 1977 (77), 1978 (78), 1979 (79) Chevrolet Nova / Chevy II Years: 1962 (62), 1963 (63), 1964 (64), 1965 (65), 1966 (66), 1967 (67), 1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72), 1973 (73), 1974 (74), 1975 (75), 1976 (76), 1977 (77), 1978 (78), 1979 (79) Pontiac GTO / Lemans / Tempest Years: 1964 (64), 1965 (65) Oldsmobile Omega Years: 1973 (73), 1974 (74), 1975 (75), 1976 (76), 1977 (77), 1978 (78) NPD Part Number : C-9709-1A Manufacturer Reference #'s: 7026520 1967-1981 CAMARO 1964-1974 CHEVELLE CHEVELLE, EL CAMINO AND MALIBU 1967-1979 FIREBIRD 1962-1979 NOVA 1964-1965 TEMPEST GTO, LEMANS AND TEMPEST 1973-1978 OMEGA WARNING : This product can expose you to chemicals including lead and DEHP, which are known to the State of California to cause cancer and birth defects or other reproductive harm

In spite of the formal ban, enforcement was exceedingly rare
But we still have a long way to go