function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cadena, Edwin-Alberto & Vanegas, Rubén Dario', 1],
    ['Figueroa, Alex & Low, Martyn E. Y. & Lim, Kelvin K. P.', 1],
    ['França, Marco Aurélio Gallo de & Langer, Max Cardoso', 2],
    ['GAFFNEY, EUGENE S. & TONG, HAIYAN & MEYLAN, PETER A.', 5],
    ['Iverson, John B.', 8],
    ['Llanqui, Irbin B. & Y. Salas, Cinthya & Oblitas, Melissa P.', 1],
    ['Meylan, Peter A. & Gaffney, Eugene S.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);