The phrase "sometimes considered as" is correct and can be used in written English.
You can use this phrase when you want to acknowledge that something is seen or interpreted in a particular way despite there being some disagreement on the matter. For example, "The Great Barrier Reef is sometimes considered as one of the seven natural wonders of the world."
These groups are sometimes considered as superfamilies or series and sometimes (particularly weevils and relatives) considered as suborders.
In style the Rajatarangini narrative is sometimes considered as versified prose on a massive scale, yet its strong structural appeal made it a model for later historians.
Storm petrel, any member of about 20 species of seabirds constituting the family Hydrobatidae, or sometimes considered as Oceanitidae (order Procellariiformes).
Sales like these are sometimes considered as almost spiritual endeavors because they preserve from commercial or residential development land that is seen as divinely inspired, those involved say.
Likewise, certain families are sometimes considered as subfamilies of closely related groups, and there may exist numerous tribes and subtribes within subfamilies.
Several other sects arose out of the general Shīʿite movement e.g., the Nuṣayrīs, the Yazīdīs, and the Druzes which are sometimes considered as independent from Islam.
We also reasoned that familiarity was an important consideration for physician prescribing behavior, and as a result hypothesized that physicians would also feel more comfortable prescribing existing drugs that are sometimes considered enhancers as compared to a hypothetical drug specifically designed and marketed as a cognitive enhancer.
Her offerings are sometimes considered unorthodox as she defies some of the orthodox religious restrictions within the Hindu tradition without denouncing the entire tradition.
The second hypothesis that we tested was that physicians would feel more comfortable prescribing extant drugs that are sometimes considered enhancers as compared to the hypothetical cognitive enhancer presented in our scenario.
Magician, one who practices magic, sometimes considered the same as a sorcerer or witch.
People expressed themselves through all caps, exclamations, italics, parentheticals, and words that are sometimes considered filler, such as "like". I was able to know myself better through Rookie, and met many brilliant, caring people, both online and off; I will cherish this place forever.
