function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chernyshev, Alexei V. & Polyakova, Neonila E.', 1],
    ['Gibson, Ray', 1],
    ['Gonzalez-Cueto, Jaime & Quiroga, Sigmer & Norenburg, Jon', 1],
    ['Kajihara, Hiroshi', 9],
    ['Kajihara, Hiroshi & Kakui, Keiichi & Yamasaki, Hiroshi', 1],
    ['Kajihara, Hiroshi & Yamasaki, Hiroshi & Andrade, Sónia C. S.', 1],
    ['Mendes, Cecili B. & Matthews-Cascon, Helena & Norenburg, Jon L.', 2],
    ['Ritger, Rebecca Kirk & Norenburg, Jon L.', 1],
    ['Sagorny, Christina & Döhren, Jörn von & Rouse, Greg W.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);