function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fusu, Lucian & Ebrahimi, Ebrahim & Siebold, Cedric', 1],
    ['Kissayi, Khadija & Benhalima, Souâd & Mitroiu, Mircea-Dan', 1],
    ['László, Zoltán & Kelemen, Tünde-Ilona & Japoshvili, George', 1],
    ['Rahmani, Zahra & Rakhshani, Ehsan & Lotfalizadeh, Hossein', 3],
    ['Soliman, Ahmed M. & Gadallah, Neveen S. & Al Dhafer, Hathal M.', 4],
    ['Tselikh, E. V.', 1],
    ['Werner, Jennifer & Peters, Ralph S.', 29]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=40)',
    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);