Correction: RGB images-based vegetative index for phenotyping kenaf (Hibiscus cannabinus L.)

• Gyung Doek Han, 
• GyuJin Jang, 
• Jaeyoung Kim, 
• Dong-Wook Kim, 
• Renato Rodrogues, 
• Seong-Hoon Kim, 
• Hak-Jin Kim, 
• Yong Suk Chung