function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akba, Melikan & Okuyucu, Cengiz', 20],
    ['Birina, L. M.', 2],
    ['Davydov, V. I. & Arefifard, Sakineh', 7],
    ['Franco, P. & Dahms, H. - U. & Lo, W. - T. & Hwang, J. - S.', 1],
    ['Leven, E. J. & Davydov, V. I. & Gorgij, M. N.', 4],
    ['Vachard, Daniel & Le Coze, François', 1],
    ['Vachard, Daniel & Le Coze, François & Cózar, Pedro', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    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);