function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Belle, Jean', 1],
    ['DeMarmels, Jurg', 1],
    ['Gonzalez Soriano, Enrique & Noguera, Felipe', 2],
    ['Mauffray, William F. & Tennessen, Kenneth J.', 1],
    ['Novelo-Gutiérrez, Rodolfo', 1],
    ['Novelo-Gutiérrez, Rodolfo & Gómez-Anaya, José Antonio', 1],
    ['Torres-Pachón, Mónica & Novelo-Gutiérrez, Rodolfo', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    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);