islet Published August 28, 2015 | By phonepaseuth ກຸ່ມນ້ອຍໆຂອງເນື້ເຍື່ອຊະນິດນື່ງ ຢູ່ພາຍໃນເນື້ອເຍື່ອອີກຊະນິດນື່ງ