function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bien, Steffen & Damm, Ulrike', 7],
    ['Calabon, Mark S. & Jones, E. B. Gareth & Pang, Ka-Lai', 2],
    ['Chandrasiri, Sajini K. U. & Liu, Yu-lin & Huang, Jun-En', 1],
    ['Cheikh-Ali, Zakaria & Glynou, Kyriaki & Ali, Tahir', 1],
    ['Gomes do Nascimento, Géssica Maria', 2],
    ['Haituk, Supitchakorn Thungdee Sukanya & Withee, Patchareeya', 2],
    ['Lv, Ruili & Yang, Xiaoqian & Qiao, Min & Fang, Linlin', 2],
    ['Tennakoon, Danushka S. & Thambugala, Kasun M. & Jeewon, Rajesh', 4],
    ['Thiyagaraja, Vinodhini & Ertz, Damien & Hyde, Kevin D.', 1],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);