function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ghahari, Hassan & Chérot, Frédéric & Linnavuori, Rauno', 1],
    ['Ishikawa, Tadashi & Saito, Masayuki U. & Kishimoto-Yamada, Keiko', 2],
    ['Krüger, Andreas & Deckert, Jürgen', 1],
    ['Krüger, Andreas & Lis, Jerzy A.', 1],
    ['Laterza, Ilaria & Tamburini, Giovanni & Panzarino, Onofrio', 1],
    ['Linnavuori, Rauno E.', 2],
    ['Lis, Jerzy A. & Lis, Barbara & Compton, Stephen G.', 2],
    ['Tezcan, S. & Gulpercin, N. & Fent, M.', 1],
    ['Zhu, Geng-Ping & Liu, Guo-Qing & Lis, Jerzy A.', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);