function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beveridge, Ian & Smales, Lesley R.', 2],
    ['Ilyukhin, Evgeny & Markovskaja, Svetlana', 1],
    ['Liu, Jingwen & Hu, Yafen & Luo, Xingxing', 3],
    ['Rathnayaka, Achala R. & Chethana, K. W. Thilini', 2],
    ['Tibpromma, Saowaluck & Hyde, Kevin D. & Bhat, Jayarama D.', 2],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 7],
    ['Wijayawardene, Nalin N. & Dissanayake, Lakmali S. & Li, Qi-Rui', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);