function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Castro-Huertas, Valentina & Minghetti, Eugenia', 1],
    ['Ghahari, Hassan & Chérot, Frédéric', 1],
    ['Inés, Olivo Verónica & Coscarón, Maria Del Carmen', 1],
    ['Ishikawa, Tadashi & Saito, Masayuki U. & Kishimoto-Yamada, Keiko', 2],
    ['Krüger, Andreas & Deckert, Jürgen', 1],
    ['Linnavuori, Rauno E.', 1],
    ['Melo, Maria Cecilia & Dellape, Pablo Matias', 1],
    ['Namyatova, Anna A. & Schwartz, Michael D. & Cassis, Gerasimos', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);