function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Erandi Yasanthika, W. A. & Tennakoon, Danushka S.', 2],
    ['Iturrieta-Gonzalez, Isabel & Gene, Josepa & Wiederhold, Nathan', 3],
    ['Liang, Yin & Ran, Shuang-Fei & Bhat, Jayarama & Hyde, Kevin D.', 1],
    ['Tan, Yu Pei & Crous, Pedro W. & Shivas, Roger G.', 14],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 2],
    ['Zhang, Qian & Yang, Zai-Fu & Cheng, Wei', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);