Hi. Would you say the following underlined parts are correct (OK?) in terms of parallel structure?<br/><br/><i>... have been suffering from <u>illnesses, diseases and injury</u>.</i><br/><br/><i>... have been suffering from <u>illness, diseases and injuries</u>.</i><br/><br/><i>... have been suffering from <u>illness, disease and injuries</u>. </i><br/><br/><i>... have been suffering from life difficulties, like <u>illness, diseases and injury</u>.</i>