function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Doyama, Kohei & Haruma, Toshikatsu & Hishiyama, Shojiro', 1],
    ['He, Yu-Ke & Jayawardena, Ruvishika S. & Kakumyan, Pattana', 2],
    ['Jiang, Ning & Tian, Cheng-Ming', 2],
    ['Naziazeno, Leticia Muxfeldt & Aptroot, André', 2],
    ['Wei, Xin & Yang, Shu Qi & Jiang, Zhi Gang & Cui, Meng Jiao', 1],
    ['Zhuang, Wen-Ying & Luo, Jing & Zhao, Peng', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);