function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acosta Galvis, Andrés Rymel & Rueda-Almonacid, José Vicente', 1],
    ['Barrio-Amorós, César L. & Rojas-Runjaic, Fernando J. M.', 12],
    ['Bravo-Valencia, Laura & Rivera-Correa, Mauricio', 1],
    ['Coloma, Luis A. & Duellman, William E. & C, Ana Almendáriz', 6],
    ['Coloma, Luis A. & Lötters, Stefan & Duellman, William E.', 3],
    ['Herrera-Alva, Valia & Díaz, Vladimir & Castillo, Ernesto', 1],
    ['Miracle, Eulàlia Gassó & Van, Lars W. & Ostende, Den Hoek', 2],
    ['Schiesari, Luis & Rossa-Feres, Denise De Cerqueira', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);