function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barreto-Triana, Nancy & Ferreira, Paulo Sergio F.', 5],
    ['Carrenho, Renan & Rodrigues, Higor D. D.', 1],
    ['Kryvomaz, Tetiana & Michaud, Alain & Stephenson, Steven L.', 1],
    ['Masłowski, Adrian & Baňař, Petr & Carapezza, Attilio', 2],
    ['Morales, Irina & Ferreira, Paulo S. F. & Forero, Dimitri', 16],
    ['Ramírez-Mora, Manuel A. & Sepúlveda-Cano, Paula A.', 1],
    ['Treviño-Zevallos, Italo & García-Cunchillos, Iván', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);