function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boll, Piter Kehoma & Amaral, Silvana Vargas Do', 2],
    ['Carbayo, Fernando & Almeida, Ana Laura', 2],
    ['Fernando Carbayo & Marta Álvarez-Presas & Cĺaudia T. Olivares', 1],
    ['Lago-Barcia, Domingo & Carbayo, Fernando', 6],
    ['Negrete, Lisandro & Brusa, Francisco', 1],
    ['Rossi, Ilana & Fontoura, Marcela & Amaral, Silvana', 1],
    ['Rossi, Ilana & Leal-Zanchet, Ana', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);