function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ebejer, Martin J. & Gatt, Paul', 1],
    ['FÖLDVÁRI, MIHÁLY', 6],
    ['Kazerani, Farzaneh & Kehlmaier, Christian', 1],
    ['Kehlmaier, Christian', 6],
    ['Majnon Jahromi, B. & Gheibi, M. & Fallahzadeh, M.', 2],
    ['Majnon-Jahromi, Bahareh & Gheibi, Mehdi & Fallahzadeh, Majid', 3],
    ['Marques, Dayse W. A. & Rafael, José A. & Pollet, Marc', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);