function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Handal, Adil Y. & Torstensson, Anders & Wulff, Angela', 3],
    ['Bilous, Olena P. & Genkal, Sergey I. & Zimmermann, Jonas', 2],
    ['Ferreira da Silva, Juliana & Oliveira, Maria Angélica', 1],
    ['Goeyers, Charlotte & Vijver, Bart Van De', 3],
    ['Kochman-Kedziora, Natalia & Van de Vijver, Bart', 4],
    ['Usoltseva, Marina V.', 1],
    ['Williams, David M. & Sims, Pat A.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    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);