Is "suffering" skipped in the middle of "...for example, from..."?
Native speaker’s answer
Rebecca
Essentially yes, it is omitted from the sentence. Since "suffering" is placed in the beginning of the sentence, it is unnecessary to place it within the rest of the sentence. Removing "suffering" from the middle of the sentence helps keep it shorter and more concise. The sentence would be "...for example, suffering from insomnia or suffering from sleep apnea..." Omitting words that have already been mentioned is very common in English.