Changsha Hospital of Traditional Chinese Medicine (Changsha Eighth Hospital), Changsha, China Introduction: Allergic rhinitis (AR) is a common respiratory disorder influenced by various factors in its ...

Classification is putting things into groups. Living things can be divided into these groups or 'classified' by looking at similarities and differences between the way they look and behave. Have a ...

Classification is putting living things into groups when they have specific things in common, including the way they look and what they do. These two groups can be split into many smaller ones ...