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Ever smokers (former and current) were then asked about age at smoking initiation (four categories: <15, 15 19, 20 29 and 30 years or older); number of cigarettes smoked per day (six categories: 6 or less, 7 12, 13 22, 23 32, 33 42 and 43 or more); and duration of smoking (four categories; <10, 10 19, 20 39, 40 or more years).
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I have spent hours trying to resolve this – I just want the line working with my old number of 39 years.
These variables included gender, average personal income, setting, having a smoker at home, having child(ren) less than 5 years old, number of friends who smoke, number of friends who permit smoking at home, and current smoking status.
13 dogs (age: median 8.0 years old; number of females (F): 8; number of males (M): 5; body weight: median 5.6 kg) were classified as healthy control subjects by each clinical veterinarian.
To update your GPA, find the credit-points of all the new classes (in this example, 4x2=8) and add to your old number of credit-points.
Also find the hour-points of all the new classes (in this case, 4x2=8) and add to your old number of hour-points.
As you get older the number of books with a capacity to change you gradually diminishes.
As the income gap widens and society grows older, the number of households claiming livelihood subsidies rose to a record 1.62 million last October.
As a population gets older, the number of irreversible corneal endothelium lesions increases.
As the calf gets older, the number of feedings per day can start to decrease.
Given the current demographic changes, and because cancer is mainly a disease of older persons, the number of older cancer patients is rising [ 1].
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com