'unless in' is not a grammatically correct phrase
Instead, you can use 'unless within' in written English. For example, "You will not get your full refund unless within 30 days of purchase."
About advertising (unless in exceptional circumstances).
The parameters r d and m can be considered as independent for each wavelength (unless in these simulations we consider them as constant).
It is therefore not possible to obtain reliable measurements of the cooling rate effect on the TRM (unless, in some cases, performed in a controlled atmosphere).
Conversely, COX-2 is rarely expressed in normal tissue (unless in proximity to an area of neoplasia or inflammation).
Moreover, our model displays neither multi-stability (unless in the case of p16INK4a gain-of-function), nor stable oscillations.
Where more than one report existed for a single country (unless in ethnically distinct populations), the one with a later average period of recruitment was preferred.
Most Poes (unless in a Dungeon, Cave, or in the snow near high peak) can only be seen at night.
Your study area should be a quiet area away from distractions and people (unless in a study group).
He never slurred words, unless in service to the rhythm.
ISPs must pay copyright owners' court fees unless in "exceptional circumstances".
