function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Benítez-Álvarez, Lisandra & Mateos, Eduardo', 1],
    ['Benítez-Álvarez, Lisandra & Sluys, Ronald', 1],
    ['Chen, Xiao-Min & Chen, Yu-Hui & Wu, Cheng-Chen & Wang, An-Tai', 1],
    ['Hellmann, Lindsey & Leal-Zanchet, Ana Maria', 2],
    ['Kanana, Yuliia & Riutort, Marta', 1],
    ['Sluys, Ronald & Kawakatsu, Masaharu', 1],
    ['Souza, Stella & Morais, Ana Laura & Bichuette, Maria Elina', 3],
    ['Stocchino, Giacinta Angela', 1],
    ['Vila-Farré, Miquel & Sluys, Ronald & Almagro, Ío', 1],
    ['de Souza, Stella Teles & Morais, Ana Laura Nunes', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);