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HLT: It wasnt so long ago that presidents from both sides of the aisle were against loosening federal marijuana restrictions

Directional changes showed a strong positive correlation from one session to the next (Fig

The authors have been clear about this and report these as limitations, said Jamie Hartmann-Boyce, an assistant professor of Health Policy and Management at the University of Massachusetts, Amherst in the US who was not involved in the study

For instance, the significant reductions in e-cigarette use in Massachusetts and New York correlated with the reported declines in e-cigarette sales in these states following their state-wide restrictions on flavored e-cigarette sales, he said

The optical density of the samples was compared against the standard curve