"except for instances" is a correct and usable phrase in written English.
You can use it when you want to explain that there are some exceptions to a general rule. For example, "We close our store at 6:00 PM each day except for instances when we have a special promotion."
However, except for instances where distal regions were targeted with viral vectors (e.g., AAV vectors) capable axonal transport, correction of lysosomal storage pathology was typically localized to areas that were proximal to the injection site.
In most pastoral societies, milking and management of milk resources are disproportionately done by women, except for instances where the cattle have to move to far distances.
In contrast, except for instances involving uprooted trees or movement of soil-burrowing animals, AMF are generally not exposed to soil disturbances of this scale.
On the streets, Ms. Jacobs and others said, the courts have determined that people should have little expectation of privacy except, for instance, in the case of undue searches.
It is possible that the nonresponding interventional centres do not perform UFE except, for instance, only nonvascular interventions.
It is usually small in biomolecules, except, for instance, in heme-containing proteins or when multiple aromatic planes are stacked together, as in double stranded nucleic acids.
We can speculate that additional WGDs have not been possible in animals once sexual chromosomes have been genetically determined, except for instance in invertebrates, fishes, and amphibians (fig. 1).
Images of dead bodies (especially if the individual is identifiable) should be avoided except in exceptional circumstances, for instance in connection to reporting atrocities of war.
Two years later, Baldota reiterates that "except for one or two instances of crossing each other during social functions, I have never met [Reddy]".
A limit to this approach remains the degree of imbalance being usually difficult to foresee at the planning stage, except when, for instance, families or practices are randomized and clusters as a whole are included in the trial.
This worked pretty well, except for the instances in which I discovered people wearing significantly smaller sizes than I do.
