function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 1],
    ['Aslan, Ebru Gül & Mumladze, Levan & Japoshvili, George', 1],
    ['Biondi, Maurizio & D\'Alessandro, Paola', 1],
    ['Broun, Thomas', 1],
    ['Cho, H. - W. & An, S. L.', 8],
    ['Dejean, Pierre François Marie Auguste', 1],
    ['Döberl, Manfred', 2],
    ['Eiseman, Charles S.', 1],
    ['Ekiz, Ali Nafiz & Şen, İsmail & Aslan, Ebru Gül & Gök, Ali', 1],
    ['Gök, Ali', 1],
    ['Konstantinov, A. S. & Moseyko, A. G.', 2],
    ['Petitpierre, Eduard & Sacarés, Antoni & Jurado-Rivera, José A.', 13],
    ['Sergeev, M. E.', 2],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);