function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Zhi-Teng', 1],
    ['Chen, Zhi-Teng & Du, Yu-Zhou', 1],
    ['Judson, Sarah W. & Nelson, C. Riley', 3],
    ['Li, Weihai & Murányi, Dávid & Shi, Li', 5],
    ['Li, Wenliang & Wang, Yingying & Wang, Ying & Li, Weihai', 2],
    ['Rehman, Abdur & Huo, Qing-Bo & Du, Yu-Zhou', 1],
    ['Shi, Wenju & Wang, Hongliang & Li, Weihai', 2],
    ['Zhang, Yao & Wang, Bingli & Yao, Gang & Li, Wenliang', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);