function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Dursun, A. & Fent, M.', 1],
    ['Ghahari, Hassan & Chérot, Frédéric & Linnavuori, Rauno', 6],
    ['Krüger, Andreas & Lis, Jerzy A.', 2],
    ['Lis, Jerzy A. & Lis, Barbara', 1],
    ['Lis, Jerzy A. & Lis, Barbara & Compton, Stephen G.', 1],
    ['Tezcan, S. & Gulpercin, N. & Fent, M.', 1],
    ['Usinger, Robert L.', 2],
    ['White, Francis Buchanan', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);