function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Caira, J. N. & Jensen, K.', 3],
    ['Lunaschi, Lia I. & Álvarez, Victor Hugo Merlo', 1],
    ['Maleki, Loghman & Malek, Masoumeh & Palm, Harry W.', 9],
    ['Muniz-Pereira, Luís C. & Vieira, Fabiano M. & Luque, José L.', 1],
    ['Rodriguez-Ibarra, Erick & Violante-Gonzalez, Juan & Monks, Scott', 3],
    ['Vardo-Zalik, Anne M. & Campbell, Ronald A.', 6],
    ['Yang, Chaopin & Sun, Yuan & Zhi, Tingting & Iwaki, Takashi', 2],
    ['Zaragoza-Tapia, Francisco & Pulido-Flores, Griselda', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);