function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chaparro, Juan C. & Padial, José M. & Riva, Ignacio De La', 2],
    ['Chaparro, Juan C. & Riva, Ignacio De La & Padial, José M.', 1],
    ['Chavez, German & Garcia-Ayachi, Luis A. & Catenazzi, Alessandro', 1],
    ['Chávez, Germán & Santa-Cruz, Roy & Rodriguez, Daniel', 2],
    ['Duellman, William E. & Hedges, Blair', 2],
    ['Díaz, Vladimir & Mamani, Luis & Catenazzi, Alessandro', 1],
    ['Lehr, Edgar', 1],
    ['Lehr, Edgar & May, Rudolf von & Moravec, Jiri', 1],
    ['Lehr, Edgar & Moravec, Jiri & Cusi, Juan Carlos', 2],
    ['Lehr, Edgar & Oróz, Anahí', 2],
    ['Mamani, Luis & Malqui, Sergio', 1],
    ['May, Rudolf Von', 1],
    ['Miracle, Eulàlia Gassó & Van, Lars W. & Ostende, Den Hoek', 1],
    ['Rodriguez, Lily O. & Catenazzi, Alessandro', 4],
    ['Venegas, Pablo J. & Barboza, Andy C. & Riva, Ignacio De La', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);