Это название специальной услуги. Статья рецензируется и публикуется на сайте раньше бумажной версии.

"Clinical Therapeutics offers Express Track peer review service for time-sensitive manuscripts, for a fee of $1000 USD per submitted manuscript for Original Research. This fee is nonrefundable and noncancellable. Payment instructions are provided at the time of submission. Express Track submission fee guarantees you:

•High-quality peer review, completed within 5-10 business days.

•A reject or revise decision provided to the author within 3 business days of receipt of reviewers' comments by the editorial office.

•A final decision on revised manuscripts within 15 business days of receipt (excluding requests for subsequent revisions).

...

Accepted manuscripts are published online in advance of print within 20 days from acceptance (pending author approval of finished proof and payment of page charges), and are scheduled for publication in the next available issue.

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Note added at 2 hrs (2018-02-19 13:03:11 GMT)
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Название наверно можно не переводить (Услуга "Express Track"). Или перевести описательно - "услуга по ускоренному рецензированию и публикации научных статей".

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Note added at 3 hrs (2018-02-19 13:10:39 GMT)
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Хотя в этом случае имеется в виду статья, опубликованная посредством данной услуги на сайте до выхода бумажной версии журнала.

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Note added at 5 hrs (2018-02-19 15:36:57 GMT)
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Не за что!