function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cao, Liang & Zhang, E', 1],
    ['Chen, Shi-Jing & Peng, Zuo-Gang', 1],
    ['Chen, Shijing & Sheraliev, Bakhtiyor & Shu, Lu & Peng, Zuogang', 1],
    ['Freyhof, Jörg & Geiger, Matthias F. & Golzarianpour, Kiavash', 5],
    ['He, Chunlin & Song, Zhaobin', 1],
    ['He, Chunlin & Song, Zhaobin & Zhang, E', 1],
    ['Jinlu Li & Naifa Liu & Junxing Yang', 19],
    ['Li, Jinlu & Liu, Naifa & Yang, Junxing', 2],
    ['Li, Wen-Jing & Chen, Xiao-Cheng & Hu, Yan-Ping', 2],
    ['Ren, Qiu & Yang, Jun-Xing & Chen, Xiao-Yong', 1],
    ['Sheraliev, Bakhtiyor & Kayumova, Yorkinoy & Peng, Zuogang', 1],
    ['Wu, Tie-Jun & Wei, Mu-Lan & Lan, Jia-Hu & Du, Li-Na', 2],
    ['Ye, Enqi & Xing, Yingchun & Zhang, Chunguang & Zhao, Yahui', 3],
    ['Çiçek, Erdoğan & Fricke, Ronald & Eagderi, Soheil', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=51)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);