function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Artand, Saeid & Mehrabi-Koushki, Mehdi & Tabein, Saeid', 5],
    ['Biondi, Maurizio & D\'Alessandro, Paola', 1],
    ['Cho, H. - W. & An, S. L.', 6],
    ['Du, Tianye & Hyde, Kevin D. & Mapook, Ausana', 1],
    ['Goncalves, Micael F. M. & Vicente, Tania F. L. & Esteves, Ana C.', 2],
    ['Htet, Zin Hnin & Mapook, Ausana & Gafforov, Yusufjon', 3],
    ['Hu, Hongmin & He, Minghui & Wu, Youpeng & Long, Sihan', 2],
    ['Samarakoon, Binu C. & Phookamsak, Rungtiwa', 2],
    ['Sergeev, M. E.', 1],
    ['Wanasinghe, Dhanushka N. & Nimalrathna, Thilina S.', 9],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=40)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);