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This is particularly the case for the more than 300 million people worldwide who use smokeless tobacco products, most of whom live in low-[income] and middle-income countries where health systems are less well-resourced to diagnose and treat noncommunicable diseases

That's roughly 23 percent of the population, and also represents a decline from 25.5 percent of the population in 1990, 33.2 percent in 1980 and 37.4 percent of the population in 1970

The viral inoculum concentration for each leaf was 50 L of 20 g/mL

In general, not dangerously bad