function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bonacci, Teresa & Mazzei, Antonio & Horak, Jakub', 4],
    ['Bouchard, Patrice & Bousquet, Yves & Davies, Anthony E.', 1],
    ['Champion, George C.', 1],
    ['Dejean, Pierre François Marie Auguste', 1],
    ['Fabricius, Johann Christian', 2],
    ['Jaskula, Radomir & Michalski, Marek & Marris, John W. M.', 2],
    ['Majka, Christopher G.', 2],
    ['Marris, John W. M. & Ślipiński, Adam', 19],
    ['Mąkol, Joanna & Felska, Magdalena & Moniuszko, Hanna', 1],
    ['Published, First', 1],
    ['Swezey, O. H.', 1],
    ['Thomas, Michael C. & Ghahari, Hassan', 2],
    ['Zaragoza-Caballero, Santiago & Rodríguez-Mirón, Geovanni M.', 1],
    ['Zhao, Ming-Zhi & Zhang, Jin-Kun', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);